It can also mean "What's the matter" or "Whatever that means." How to use 'WTM' You can use "WTM" by itself to ask about upcoming plans or happenings, or you can use a phrase like this: ...

What does 'ISTG' mean? "ISTG" stands for "I swear to God," an acronym usually used to express the seriousness of a situation or assure you're not joking when sharing a surprising fact.