ISTG is short for “I Swear Too God
Rick: ISTG if Bill isn’t hear soon I’ll hack his roblox account
by ShitCuntfromStraya December 31, 2019
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Mk at this point, don't answer this person to be honest. When someone says "Istg or Istg Stfu". Just seriously they, you lose, give up. You're only going to dig yourself deeper by talking
Omg, "Istg Stfu" Can u seriously stop dumbass
by ThatEboyyyyyyy March 9, 2021
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I swear to god, commonly used for expressing annoyance.
Person 1: OMBB like.. yeahhh we DONT invite you to OUR party~~
Person 2: Istg could you just shut up, you don't even host a party ever in your live.
Person 2: Oh wait i forgot you don't have a live.
by Silkyy May 8, 2022
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Istg means " i swear too god "
istg i didnt do ur girl man
by Deizomando September 5, 2023
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Slang - I swear to god
Most used by gen z People
ISTG YOUR MAKING ME MAD
by ☁ cloudy_rainz ☁ September 10, 2021
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istg if you dont get down from there

or
you are so annoying istg
by 2xsugacube February 5, 2021
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interracial sexually transmitted gonorrhea. It is a disease related to ligma, but more on the side of sugondese. it has interracially spread from wakandans to the bri'ish, and has a lethality rate of 69%. Unfortunately due to this, most patients have died of istg, but not more than ligma. Famous youtuber and streamer ninja died of ligma, but people hope that istg doesn't take a celebrity like ninja fortnite blevins.
by uberchuberguy123 November 23, 2021
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