istmfg

Abbreviation of I Swear To Mother Fucking God. Similar to “I Swear To Fucking God” istfg, in that it is an escalation of the original term “I Swear To God” istg. A very dramatic phrase to be used only in exceptional circumstances.

John: I wrecked my car
Dave: ISTG John, again?
John: I hit yours.
Dave: ISTMFG

by thevalleyboy April 6, 2019

Istg

Usually used in texts, meaning " I swear to god "

Istg that teacher is so annoying :/

by Sushi dushi 🍣 October 25, 2018

ISTGIGCSHCAH

I swear to god im gonna commit several hate crimes against humanity.

ISTGIGCSHCAH. They deserve.

by CyriLLac June 9, 2020

Istg

I swear to god

I was walking down the street this morning and istg i saw someone that looked exactly like you

by Truxkmayne September 13, 2018

istg

Istg short for "I swear to god" usually in texts between girls or group chats

girl 1: oi u see (persons) tweet yesterday

girl 2: Literally

girl 3: nah what post

girl 4: Istg you didnt see that?

by Mushr0omElf September 29, 2022

Istg stfu

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

ISTG

meaning : i swear to God

Alex : BRO JAS IS HOT ASF

Naiasm : ISTG SHE IS

by xxxtentacionwife April 27, 2022