2. (Douchebag lingo). Stupid, boring. (i.e. "that's gay.")
3. (Archaic) Happy, joyful.
Note: the second definition is considered highly offensive to LGBT community and their allies. Use of the word 'gay' in this context really does make you a douche.
Person A: I'm gay. I've always been attracted to men, and I have finally decided that there is no point staying in the closet because nothing can change who I am.
Person B: Good for you! :)
Douche A: Look at my new affliction shirt! My old one was so gay, so I'm going to wear this one every day now, for when I'm not at the gym. I can bench 400.
Douche B: Gay. I can bench like 450. Can you take a picture of me so I can show off my spray-tanned abs?
Douche A: Yeah man. I benched like 600 today. Could have done better. Look at me.
Douche B: Lets go take advantage of women so the world can know how straight we are.
Gay guy: I'm gay. You're the first person I've told.
Person who thinks they're the freshest thing since sliced bread: I'm feeling gay too! Let's go and be jolly and gay, and have a gay old time. *Self-satisfied smirk*
Gay guy: Bitch, fuck you.
2)an insult questioning the insulting of a male by implying 1)
3)a refernace to something that is low quality or generally unacceptable
2)your a damn gay!
3)this song is so gay