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What Does ISTG Mean?

ISTG is one of the most common new acronyms used by teens. It is important for parents to keep up with new teen lingo so that they can better communicate with their teenagers. ISTG is a casual phrase that’s used in texts, DMs, and on social media platforms like TikTok. ISTG can convey a range of emotions including annoyance, surprise, seriousness, frustration, and exasperation.

What Does ISTG Stand For?

ISTG stands for “I swear to god”. It is an acronym used to express seriousness in one’s frustration. While the phrase “I swear to god” is not necessarily new, it was not commonly used as an acronym until the new age of TikTok slang.

Is the Acronym ISTG Inappropriate?

If you consider the phrase “oh my god” inappropriate, you’d likely find the acronym ISTG inappropriate as well. While it is not usually used in an offensive manner, some people do not think it is appropriate to use the word god like that. For the most part, ISTG is not derogatory or inappropriate.

How is ISTG used?

  1. To express certainty. If someone is very sure of something, they can use the phrase ISTG
  2. To express frustration. If someone is frustrated, they can say ISTG to emphasize their frustration
  3. To express seriousness. When someone else shows disbelief, you can say ISTG to show them that you are serious in your statement


ISTG is usually used to express frustration. Here are some examples of how it is used:

“If this game lags one more time, ISTG I quit”

“ISTG, Tony never passes me the ball”

“My quads are so sore! ISTG I’m never doing leg day again!”

“ISTG if Kevin doesn’t do his part of the project I’m telling the teacher”


If your teenager is saying ISTG, you do not have to worry. It is not a harmful or derogatory term, just simply part of internet speak. It is used very casually and lightheartedly! ISTG simply stands for “I swear to god” and have many different uses.