What's on your mug?

i swear to god

“istg i saw the fight last night”

By vamppluto

ISTG is the short form of "I swear to God" Also means I promise.

ISTG that microorganism is not my boyfriend!!!

By Nlovespastel

I swear to god

Istg I’m gonna fail this test

By Randhandle

It stands for *I Swear To God*

Istg you're dumb for not knowing what "Istg" means.

By Daniel Brew Strength

Instead of Grandpa

I prefer grandma's cookies istg

By missnoma