Definitions by BATES,

gay 

1) Used when referring to something which is crappy or un-useful.

2) Used just after being told something that you really didn't need to know.

3) Someone who is boring or making the situation boring.

1) God, this stereo is so gay!

2) Man1: Oh man, you're sitting in a car!
Man Sitting in Car: Dude, that is so gay.

3) God this party is so gay!

gay by BATES, October 5, 2007