This phrase is typically employed to express surprise, disbelief or concern over a given situation. There needs to be a TikTok user manual that includes a glossary because new abbreviations and slang words are constantly being churned out and I, a millennial, cannot keep up. Chronic Obstructive Pulmonary Disease D. -ISTG that was the best pizza ever! -I put your racket back in your duffle bag istg. OTP meaning: one true pairing (a couple that fans prefer to all other. ISTG=Make a PromiseWhat Is ISTG Meaning in SlangIstg Slang Usage (Examples and Use Cases)ISTG Meaning on TikTokISTG Meaning SnapchatFAQs on ISTG Meaning1. It is a stronger version of the phrase “I swear”. Here's what this versatile slang term means and how you can use it in your messages and social media posts. TLDR meaning: too long; didn't read. The abbreviation “ISTG” is a shorthand. It is very similar to ISTFG meaning, however, there are additional letters added within the acronym. STG: You can swear to god when you are frustrated or in exacerbation. It can be written in both lowercase “istg” and capital “ISTG” letters. As in, I swear that actually happened. The abbreviation ISTG is widely used in text messaging and online chat with the meaning "I Swear To God. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're not joking when sharing a surprising fact. You can use it to show your deep frustration, attest to the truth of something, or underline your beliefs. ISTG Meaning= Honesty or Certainty2. Looking for online definition of ISTG or what ISTG stands for? ISTG is listed in the World's most authoritative dictionary of abbreviations and acronyms ISTG - What does ISTG stand for?Definition of the term. ” Origin of ISTG. It represents an empathetic or mildly shocked response to unexpected news or events. Alternatively, you might say ISTG to show exasperation or frustration at something someone is telling you. Origin of ISTG. ISTG is an acronym used for “I Swear To God. What does OTP mean in texting? “OTP” means “one true pair/pairing,” according to Merriam-Webster. The texting term ISTG, which means "I Swear To God," tells people that you really do mean what you're saying. Even though the phrase includes “God,” its meaning and uses aren’t considered religious. ISTG Meaning What Does “ISTG” Stand For? If you’ve ever seen “ISTG” in a text message or on social media, you might be wondering what it means. Usage: “Oh nice, you finally finished it! Welcome to the club B)” What does BB mean?What Does ISTG Mean in Texts or on Social Media? ISTG means “I swear to God” in text messages and on social media platforms like TikTok, Snapchat, Twitter, Instagram, and more. I swear to f**king god (ISTFG) is an abbreviation used to express exasperation, disbelief, or agreement. This phrase has a couple of variants, S2G and ISTG, and is frequently used in texting or on social media. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness. Pushin P is a popular phrase in the Bay Area and Texas that was popularized by Atlanta rapper Gunna. Use Cases & Examples. ”. The”I” is the person who is saying it, while”F” is an expletive “F” can be an exclamation point added to the expression. ISTG can be used in various contexts and can have different implications depending on the conversation. Like, "ISTG, if I get one more. One such popular slang on platforms like Snapchat is ‘ISTG’. The phrase “so what” is often used to express indifference or dismissiveness about the topic at hand. What does ISTFG mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: ISTFG. More violent then just I Swear To GodISTG is an acronym that is short for “I swear to God”. '. It stands for “I swear to God. Here’s what this multifaceted slang term means and how you may. Guarantee. What Does “ISTG” Stand For? “ISTG” is an acronym that stands for “I Swear to God. ILYSM means "I Love You So Much. Definition of ISTG in Slang/Internet Slang. Having a parental control app on your child’s phone will give you. The “baby” part of the phrase isn’t a literal reference to a child, and. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're not joking when sharing a surprising fact. It is an acronym used to emphasize a belief in or commitment to the truth of a statement. What Does ISTG Mean In Texting? Snapchat represents a real-time multimedia communication platform that takes a step beyond traditional messaging applications. ISTG Meaning. I Swear to God. It can be used as an exclamation, where users are expressing disbelief or shock. ”. Jamie Grill / Getty. What Does ISTG Mean In Texting? ISTG is an acronym used for “I Swear To God. " People use it in various places on the internet to tell someone to stop talking or as a gut reaction to something offensive or mean-spirited. Start the day smarter. ”. ISTFG. ISTG is often used in informal conversations, texting, and on social media platforms. Swear to fucking god. What does ISTG mean? ISTG means “I Swear To God”. " ISTG is used to add emphasis to a statement (usually a promise, threat, excuse or apology), or as an interjection which expresses surprise, skepticism or exasperation (similar to OMG ("Oh My God!") ). Today, I'll walk you through what ISTG means in text and other text. Simply put, “ISTG” stands for “ I swear to God . Get all the news you need in your inbox each morning. The abbreviation ISTG is widely used in text messaging and online chat with the meaning "I Swear To God. "Meaning; ISTG: I Swear to God: ISTG: Immigrant Ships Transcribers Guild: ISTG: Information Storage Technology Group (University of Twente; Netherlands) ISTG: Inter-Site Topology Generator: ISTG: Implicit State Transition Graph: ISTG: Integrated Systems Tech Group (Tampa, FL) ISTG: Innovative Science and Technology Group (est. This acronym often highlights the sincerity, seriousness, or exasperation of the person using it. This should not be used in any formal setting, no matter how informal it may seem, via social media or text. ”. . ISTG can be used to express extreme seriousness, anger, or surprise, and is usually used outside of serious religious contexts. It is commonly. Chronic Osteomyelitis Pathology Degree Embed Share an image of ISTFG » Click to view: Hearing impaired tip:. ” Kids often use this to express frustration or exasperation. A very dramatic phrase to be used only in exceptional circumstances. 1 definitions of ISTG. So, if you ever heard OMG (O My God), another popular acronym, ISTG won’t surprise you anymore. ABC – This doesn’t stand for anything. I swear to fucking god. ISTG is an internet slang initialism that conveys earnestness, annoyance, or surprise. Further Reading: What Does NFS Mean: Here Is All-inclusive Information You Need to Know. They are there for each other on the good days and the bad days. Complaint Of Patient Data C. TikTok lingo is hard to keep up with. You’ll find it all over the internet, from social media platforms like twitter and instagram to direct messages between friends. It’s used to convey a deep sense of seriousness about a situation or to emphasize a point being made. ONB is an abbreviation commonly used in texting, which stands for “Oh No Baby”. What Does Istg Mean? The acronym ISTG stands for “I swear to God. . ISTG is used to express frustration or annoyance at something or to show emphasis on a statement. In simple terms, “istg” stands for “I swear to God,” a popular expression used to emphasize the truthfulness or intensity of a statement. 2006)Texting with friends is the best way to use this term. ISTFG, if you don’t stop playing your music so loudly, I’m going to lose it. Here’s our round-up of the latest Roblox slang. FOMO meaning: the fear of missing out. The slang abbreviation ISTG is frequently used as an interjection to express emotion or as an attestation of honesty. ISTG Meaning. suggest new definition. Since this is a very casual acronym, avoid using it in. So, if you ever heard OMG (O My God), another popular acronym, ISTG won’t surprise you anymore. It is a reference to swearing or commitment to God that is not something to take lightly as it is a risk that the person who is saying it could be punished in the event of lying. Clear Of Patient Diagnosis B. This phrase should only be used in casual conversation. ATP meaning: answer the phone. It’s similar to the term ‘ONG. It can be used to convey sincerity, make promises, express annoyance, and more. I just won the jackpot on the lottery ticket I bought yesterday, ISTFG! 5. I Swear to God. It’s a direct and sometimes blunt way of communicating that the information just shared doesn’t impress, affect, or matter to the person asking “so what. ”. It’s often used as an exclamation or a way to emphasize something and can be written in lower or upper case letters. ISTG Meaning= Threat Use Cases & Examples. Specifically, as internet usage is increasing daily, people. This initialism should be avoided in professional situations or in conversing with someone who is religious. It can often. When someone doubts something you said, using ISTG is a way to make a solemn oath that most people respect and are more likely to believe. OFC meaning: of course. IMO meaning: in my opinion. This is a casual phrase that many people use both online and in real life (imagine someone exclaiming “I swear to God!” when they’re frustrated or emphasizing a point). Let’s talk about the other meanings of this common abbreviation and find out what it means for different people in different contexts. Read Also: What does CFS mean on Instagram? Common Uses for ISTG . " It is an internet acronym used in online chat to express frustration, surprise, or vehement assertion. ISTG is a slang abbreviation used in online messaging and texting that means 'I swear to God. STFG stands for Super Teacher Friends Group. Throughout the years, a variety of terms have arisen which make it easier to communicate online. I’m beyond shocked. Annoyance and Assurance Another ISTG How to Use ISTG One of the hottest internet acronyms among today's teenagers is ISTG. The ISTG acronym is commonly used in response to a person who doubts something that you said. In summary, ISTG is an acronym widely used in informal online communication. Going deeper into its meaning, ISTG sounds quite similar to OMG ‘Oh My God!’. ISTG is an acronym that is short for “I swear to God”. This abbreviation is typically used to express surprise, confusion, disbelief, or. ”. While the presence of the word “God” might indicate some religious connotation, it’s not a religious term at all. ” Origin of ISTG. ” It is commonly used in text messaging and online chat to emphasize the truth or sincerity of a statement. The origin of ‘ISTG’ can be traced back to the phrase “I swear to God,” which. It can be a powerful tool for self-motivation and encouragement. It is commonly used as an exclamation or interjection. However, as with many other abbreviations meaning "I love you," it should not. When someone uses ISTG, they are essentially emphasizing. ETA meaning: estimated time of arrival. "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're. Do you know what ISTG means in a text message? Watch this video to find out when to use ISTG in a text message and what it means!What Does “ISTG” Stand For? “ISTG” is an acronym that stands for “I Swear to God. Further Reading: What Does NFS Mean: Here Is All-inclusive Information You Need to Know. This is also very similar to. ISTG Unveiled: Introduction to the Slang. Key Takeaways: ‘ISTG’ stands for “I Swear To God” and is commonly used in text messages and online chat. new search. It is commonly employed in informal chats, videos, and posts to show seriousness and truthfulness. ISTG Meaning. It can be used to convey extreme seriousness, exasperation, or surprise, and is usually used outside of a serious religious. The Meaning of ISTG in Text. ” Definition: Istfg is an acronym for “I swear to f Up. ILYSM can be used to express profound affection. 2. Its meaning is “I Swear To God,” and it is commonly used to add sincerity or emphasis to a statement. U Jelly has become a very popular expression, and because of its viral spreading nature, it has achieved meme status. B) used to be the symbol of a person wearing sunglasses with a smile on his face. What Does ISTG Mean in Texts or on Social Media? ISTG means “I swear to God” in text messages and on social media platforms like TikTok, Snapchat, Twitter, Instagram, and more. What does LFG ð mean? LFG as “let’s freaking go” has since become widespread in texts among friends as a way to excite or “hype up” one another about a particular event or situation. The media could not be loaded, either because the server or network failed or because the format is not supported. What does Istg mean in text message . This initialism should be avoided in professional situations or in conversing with someone who is religious. When used in text conversations, ISTG retains its original meaning of “I swear to God. Matching search results: Since the STG meaning is often expressed fully when in a verbal conversation, the term STG should only be used in casual conversations via text or on social media. You will find information about the origin and other possible meanings in all types of information on this acronym, including its. It's a close relative of the OMG (Oh My God). Usually, students or the young generation use this acronym. It is commonly used in text messaging to express the seriousness of a situation or to assure that a statement is not a joke. Also, Check What Does SNM Mean In Texting? What Does ISTG Mean and How Is It Used in Real Context? The use of shortened phrases is a popular way to communicate in text messages and online conversations. Usually, students or the young generation use this acronym. This phrase can be used to swear truthfully without having to use a more serious swear word, such as the word "God". For example, they might say “ISTG this homework sucks. Promise. This is a common acronym that is used online, typically in text-based communication. ” This abbreviation is commonly used in informal conversations on various digital. It comes from the courtroom oath that traditionally said, “i swear by almighty god that the evidence i shall give shall be the truth, the whole truth, and nothing but the truth. HMU meaning: hit me up. It's used express emotional sincerity or to seem intimidating. Pinky promise. ISTG is simply an acronym that means I swear to God. Specifically, as internet usage is increasing daily,. "I swear to. The phrase was later. "I swear to God" isn't just texting slang – it's used in everyday conversations to emphasize the truth at hand. What Does ISTG Mean? Introduction. ISTG is commonly used in text messages and other social media conversations as a way to emphasize the truth or sincerity of a statement. It’s also like STG. ISTG is simply an acronym that means I swear to God. OFC meaning: of course. What does B) mean? Back when emojis weren’t a thing, ‘emoticons’ were used to add more emotions to the text. This. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're not joking when sharing a surprising fact. ”. Use ISTG to show you’re not joking about something, or to express annoyance or frustration with something (or someone). 4. Page ContentsWhat Is ISTG Meaning1. The”I” is the person who is saying it, while”F” is an expletive “F” can be an exclamation point added to the expression. ISTG. Its meaning is “I Swear To God,” and it is commonly used to add sincerity or emphasis to a statement. ”. Likewise, if you have ever seen the text code "ISTG" in texting and wondered what does ISTG mean in text. It is a commonly used slang expression used to emphasize that someone is telling the truth, or to add emphasis to a statement. It could be used to show how excited they are or to express. While some text codes (like brb, lol, and omg) are simple ones that parents can understand, it can be difficult for parents to understand many codes teenagers use nowadays. ISTJ types like to have clear goals and realistic deadlines, and to work with factual data to solve problems and monitor progress. ISTG is an acronym that stands for “I Swear To God”. HMU meaning: hit. Likewise, if you have ever seen the text code "ISTG" in texting and wondered what does ISTG mean in text. It is an expression used to emphasize the truthfulness or sincerity of a statement. The phrase “I swear to God” has been used for hundreds of years and is basically taken from the Old English word “swear” which means an oath. One of the known acronyms is “ISTG” or “istg”. It’s also like STG. ISTG is an acronym that means I swear to God. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're not joking when sharing a surprising fact. Correct: ISTG Correct: istg Incorrect: iSTG Usage Use of the abbreviation can be found in the following places. More violent then just I Swear To God Learn what ISTG means in this quick and easy guide! Find out what the abbreviation stands for and how to use it in real life with this simple explanation. “ISTG” stands for “I swear to God,” and it’s commonly used in texting to express the seriousness of a situation or to assure someone that you’re not joking when. Prison gang. ISTFG, I can’t believe she actually said that to me. ”. It can also be an expression of surprise or. ISTG stands for I Swear To God. Confused about slang like cap, HB, ATP, and more? We defined some popular TikTok acronyms for you. ISTG and OMG can also be used interchangeably often. This can be seen in phrases like: “ISTG, I’m always here for you” or “ISTG, I’ll never forget what you did for me”. It is used to emphasize a statement, a promise, or a claim, to express frustration, or to make a solemn vow. Here's what "ISTG" means and how you can use it in your next text exchange. By swearing to God, you make a sacred oath that most people respect more and therefore, are more. TLDR meaning: too long; didn't read. new search. ’. Today, I'll walk you through what ISTG means in text. -ISTG that was the best pizza ever! -I put your racket back in your duffle bag istg. It may sound like a new term to some, but this one is very familiar to social media users. In texting lingo, “istg” simply stands for “I Swear To God”. They prefer to work in traditional organisational environments, with people who take their. For example, if someone decides to message you with insulting comments about your hair, then you might reply with "STFU. This expression is used to emphasize the truthfulness or seriousness of a statement. One of the main uses of ISTG is in text messages or chats, either between friends or in a. Get all the news you need in your inbox each morning. In a different context, “sw” can also mean “someone who. Overall, the acronym STG stands for “swear to God. GTFO can be used to express disbelief or displeasure. The ISTG definition includes a short acronym for a phrase that reads as ‘I Swear To God’. Essentially, ISTG is a shortcut way of saying "I. ISTG meaning is “I Swear To God” and is one of the most widely used acronyms in the English language. What does GM mean in text from a guy?What does df mean in texting? In the realm of texting and digital messaging, “df” usually stands for “da fuq”, a slang and casual form of saying “the fuck”. Matching search results: Since the STG meaning is often expressed fully when in a verbal conversation, the term STG should only be used in casual conversations via text or on. The expression “I swear to God” is used for centuries and originates directly from the Old English word “swear” which means swearing. The phrase originated as a method for people to express a greater level of certainty about a statement they’re making in a conversation. 3. “I swear to God” is a common phrase that people use to show that they are telling the truth or to express their sincerity. It can be used to express emotions, surprise, or sudden kind of feelings. ISTG Meaning= ThreatUse Cases & Examples. " The abbreviation ILYSM is used with the meaning "I Love You So Much" as an expression of affection. ISTG. It can be used to convey extreme seriousness, exasperation, or surprise, and is usually used outside of a serious religious context. ISTG stands for: I Swear To God. Similar to “I Swear To Fucking God” istfg, in that it is an escalation of the original term “I Swear To God” istg. For example: What does ISTG mean? ISTG is an acronym that means I swear to God. Simply put,. ISTG is an acronym used in texting, which stands for “I swear to God. Meaning. ABC means asking another player (or telling another player you’re ready) to make an offer, trade or perform a task in Roblox, such as roleplaying in a game. It can also be used as an expression of sincerity, such as when a user is making a promise or expressing their. What does STG mean?U Jelly is often used to goad someone online or in-person because you possess an article that they do not have, or because you have attained some kind of gamer achievement or minor online fame. A. It's not typically used in a religious context. ISTG stands for “I swear to God” in texts and on social media apps. Testify. This is also very similar to. Start the day smarter. ” How to understand Texting Abbreviations!! LOL and LMAO, SMH, FFS… and all the other ISTG Meaning A short video summarzing the most common. IYKYK meaning: if you know, you know. The term is primarily used to emphasize a point you’re making and can reiterate anger or annoyance. So, the next time you see someone using “istg” in a message or post, you’ll know exactly what they mean. In conclusion, “ISTG” is an acronym that stands for “I swear to God. ISTFG. It is used to emphasize a statement, a promise, or a claim, to express frustration, or to make a solemn vow. On the internet, there’s a lot of jargon and abbreviations that often confuse even the most seasoned internet user. Use ISTG to show you’re not joking about something, or to express annoyance or frustration with something (or someone). ISTG stands for "I Swear to God. It could be used to define the frustration or annoyance you might have towards something or somebody. STG means different things to different people but its most common meaning is ‘Swear To God’. The acronym ISTG is commonly used in text. Summary: · The added I at the beginning just refers to the person that is saying this, so ISTG means “I Swear To God”. It is very similar to ISTFG meaning, however, there are additional letters added within the acronym. The slang abbreviation ISTG is frequently used as an interjection to express emotion or as an attestation of honesty. " ISTG is used to add emphasis to a statement (usually a promise, threat,. ISTG stands for “I swear to God” and is often used on Snapchat to emphasize a point or express strong emotion. What Does ISTG Mean? In internet chatting and text messaging, the acronym “istg” actually means the phrase “I swear to God. How Is ISTG Used? Use Cases & Examples. -ISTG that was the best pizza ever! -I put your racket back in your duffle bag istg. What Does “ISTG” Stand For? “ISTG” is an acronym that stands for “I Swear to God. This initialism should be avoided in professional situations or in conversing with someone who is religious. For example, three sample text messages using the abbreviation ISTFG could be: 1. Some of these words and acronyms are used on other video games and social media platforms too. The term comes from “shipping” within fandom culture. ISTFG means “I Swear To Fing God” and is typically used in informal texting to express frustration or disbelief. It is typically used to show appreciation of an act of kindness by a loved one. ISTG has multiple definitions that can be used in various settings. If you see someone using ISTG when texting, they’re probably emphasizing how serious they are about something. 查看翻译. The slang abbreviation ISTG is frequently used as an interjection to express emotion or as an attestation of honesty. In contrast to standard text or audio messaging apps, Snapchat offers the unique ability to share fleeting live video messages that vanish as soon as they are. ” It is often used to emphasise the truthfulness of a statement or convey the seriousness of a situation. Sub the Gamer security threat group. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're not joking when sharing a surprising fact. ISTFG means “I Swear To Fing God,” a phrase used to emphasize sincerity or seriousness when making a statement. ISTG is an abbreviation commonly used in text messaging and online communication, particularly among younger generations. Use Cases & Examples. Capitalization The slang term and abbreviation “ISTG” is typically spelled in ALL CAPS or all lowercase letters. ISTG Meaning= Expression of Disbelief4. Definition of ISTG in Slang/Internet Slang. Person1: I'm so exhausted. " “ISTG” meaning over text message. Every TikTok user's FYP. Meaning. While some text codes (like brb, lol, and omg) are simple ones that parents can understand, it can be difficult for parents to understand many codes teenagers use nowadays. This is only for close friends. By using “ISTG,” individuals can emphasize the sincerity or truthfulness of their statements, especially when sharing surprising facts or. Social media platforms: Snapchat, Instagram, Twitter, TikTok, and more. This initialism should be avoided in professional situations or in conversing with someone who is religious. I swear to God. "I swear to. ISTG means I swear to God. ”. But while the slang term ISTG is harmless, other teenage slang terms could indicate that your teen is talking about risky behaviors or communicating with potentially dangerous people. This is a group of teachers that are more than friends. ISTG is short for "I swear to God. "I swear to. Avoid using this abbreviation in business or professional settings because it is so casual. Abbreviation of I Swear To Mother Fucking God. ISTG is an acronym that stands for ‘I Swear To God. "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're. – What does istg Mean in Text – ISTG is a popular online abbreviation among today’s youth. This abbreviation is commonly used in informal conversations on various digital platforms, such as text messages,. What Does ISTG Mean? In internet chatting and text messaging, the acronym “istg” actually means the phrase “I swear to God. What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're not joking when sharing a surprising fact. What does ISTG mean in the text? Ans. This abbreviation is commonly used in informal conversations on various digital platforms, such as text messages, social media posts, and online forums. It is used to express frustration, anger, or disbelief. ETA meaning: estimated time of arrival. While the presence of the word “God” might indicate some religious connotation, it’s not a religious term at all. ISTG Meaning= Threat3. Well, fret not – I’m here to help unravel the mystery for you. What Does Istg Mean In Text? I swear to God ISTG means “I swear to God. Summary: · The added I at the beginning just refers to the person that is saying this, so ISTG means “I Swear To God”. STFU is an acronym that means "shut the fuck up. -ISTG that was the best pizza ever! -I put your racket back in your duffle bag istg. It is often used in informal conversations, especially when expressing frustration or disbelief. LFG meaning: let's freaking go. ISTG stands for “I swear to God. This expression is most likely something you've heard in ordinary conversation. This phrase is often used to express frustration or exasperation with a situation or to emphasize the sincerity of a statement. It’s a widely used acronym in text messaging and online chatting on social networking sites. What does istg mean in text. ”. ”. This phrase is often used on social media while making public posts or in private chats. FYP means For You Page. The slang abbreviation ISTG is frequently used as an interjection to express emotion or as an attestation of honesty. I swear to fucking god. Whenever a TikTok user opens their app, they are directed to their For You Page, which is a stream of videos that TikTok thinks that user will like. ”. Gunna explained that the ‘P’ stands for ‘player,’ although it can also stand for. 2. You might learn your child is using this slang term by chance when a text pops up on the phone screen. 1 definitions of ISTG. showing only Slang/Internet Slang definitions ( show all 7 definitions) Note: We have 1 other definition for ISTG in our Acronym Attic. It’s an acronym that people use to express the seriousness of a situation or to emphasize that they are not joking. The phrase “I swear to God” has been used for hundreds of years and is basically taken from the Old English word “swear” which means an oath. In summary, ISTG is an acronym widely used in informal online communication. While it may seem like a phrase that you would use in casual conversation, it can be so much more than that. ISTFG. It can be used to express emotions, surprise, or sudden kind of feelings. Istfg Meaning Is: Istfg stands for “I Swear to Fucking God. suggest new definition. Usually used after saying something ‘cool’. "I swear to. showing only Slang/Internet Slang definitions ( show all 7 definitions) Note: We have 1 other definition for ISTG in our Acronym Attic. This phrase is used to emphasize the truth of a statement or assertion. ISTFG. IYKYK meaning: if you know, you know. What Does ISTG Mean? ISTG is an acronym that stands for “I Swear to God”. Expand Your Lexicon: Discover 5+ Similar Words for ISTFG When it comes to texting, understanding similar.