Acronym for: Oh my god that/this is such a fucking good track
Expresses one's fond feelings for a song being played. Often used while texting, chatting online, IM'ing or engaging in any other form of electronic communication.
Term was originally coined in the NSBRADIO.CO.UK chatroom in 2012
user1: Have you heard this song before? It's massive tunage!
user2: OMGTISAFGT!
Acronym for "Oh my God, that's so embarrassing." Refers to situations in which someone should be embarrassed or ashamed but doesn't have the good sense to be. Can be pronounced ohm-goat-see.