Some people say "that's gay" or "you're gay" as an insult to heterosexual people or other events. If you are one of those people, brace yourself, you're in for a shock.
"Gay" isn't a synonym to: stupid, weird, uncool, wrong, sucks, stinks, or any other insult like that.
Saying "that's gay" is basically saying "Look at me! I'm ignorant, insensitive and close-minded!"
The same goes for "retarded"
Guy 1: "My parents grounded me. Ugh"
Guy 2: "Man! That's gayyyyy!"
Basically saying, "thats stupid"... Something you dont like.
A: The teacher wouldnt let me finish my test.
B: Well that's gay.
A: My mom wont let me go out tonight, sorry.
B: Ugh, that's gay.
A: My sister took my favorite jeans.
B: That's gay
Phrase used to signify a stupid, unwanted, or weird idea.
Fred: Let's all dress as cats for hallowenn!
Sam: Dude, that's gay.