a fire, or to set light to somthing.

two meanings both the most accurate!
1. its pc (pollitically correct) and also a dyslexic's p.o.v of the word gay (as in omo-sexwal, not the happy kind, you know faeries?) so say it you'll feel like a ninja when you realize that the person has no idea what your saying (note to self (yag=gay bassackwards!)
2. its the abbreviated form of Y.ou A.re G.ay and its meaning gay as in sf flamboyant castro district hits on you gay not happy

To vomit or regurgitate

acronym for you are gay

it lets everyone in the chat room that you went full retard.

The acronym typically associated with the term, "You're A Gooch".

It is gay backwards.
But it really has nothing to do with being gay.
It can mean that something looks crap or not good or someones not being very nice.