Top Definition
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!
by AliKat May 25, 2012

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