its something a person says when he/she wants to insult ur mother.
example:
-i cant go.
-why
mom told me i cant
-UR MOM GAY
Charlie: Ur mom gay
You:No u
* Charlie dies
Billy: Ur mom gay
You: Ur dad lesbian
* Billy dies
Ur mom gay (this post is completely imune to no u or any outher repell)
Hilarious comeback Insult used by every teenage boy on earth.
Human 1: "Ur Gay"
Human 2: "Ur Mom Gay"
Human 1: My moms dead.
Ur mom gay is a (homophobic but not in a bad way) insult used by 13-year-olds who think they are funny.
Pwerson 1: Muy mom got coffee.
Person 2: HaHa Ur mom gay
Person 1: Actual;y, Susan is Bi and Ella is pansexual. Nice try tho.
Person 2: Ok but they are in a WLW relationship, so it's still very fruity.
A highly insulting, yet quick way to tell someone you heavily dislike them. It implies that their mother is a homosexual woman, obviously I have yet to know when this phrase begun but all I do know is that this isn't a term you should take lightly. It is also a phrase highly meme'd upon, and I still have yet to figure out why the phrase is taken with humour.