What Does ISTG Mean?ISTG means "I Swear To God".
Summary of Key Points"I Swear To God" is the most common definition for ISTG on Snapchat, WhatsApp, Facebook, Twitter, and Instagram. Here is some more information about ISTG:
|Definition:||I Swear To God|
4: Difficult to guess
Adults and Teenagers
A Text with ISTG