An insult used by Year 5 kids to insult eachother. Usually, a brave kid will say 'no you'. The one who started is called gay for however long the others decide.
Bill: Your mum gay.
Gareth: No you.

Year 5 kids: Bill is gay! Bill is gay! Bill is gay!

Bill is ruined for life
by Tsar Nicholas II April 7, 2018
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The greatest insult you could ever use. It literally means "your mother is a homosexual"
Owen: You are so shit at Rocket League!
Phillip: u mum gay
Owen: :((((
by HoboPav February 14, 2018
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The worst possible insilt any human can take in. If you say this your opponent will literally implode from embarrassment.
4th grader A : Ur momma so fat shes fat
4th grader B : Ur mum gay
4th Grader A: *dies*
by ThrillCosby February 24, 2018
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The insult used by only the most intellectual of intellectuals
man 1- fuck you
man 2- ya mum gay
man 1- curls up into corner and cries
by my name jeff xd March 22, 2018
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"ur mum gay" is a meme used by non-normies. while they unironically dab, you can laugh to yourself bc their mum gay

P.S. the correct response to this type of situation is "no u." the person who said ur mum gay with be banished to die in a small hole 5ever.
Person 1: "ur mum gay lol"
Person 2: "no u"

OOOOOOF
by sprrite March 13, 2018
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The worst insult a human can endure, once this insult has been said, it cannot be unsaid.
Zack: Ellis, have you eve...
Ellis: ...Yo mum gay
Zack: No! how can you say this?
*Zack dies in a burning inferno*
by Cardiff Lad February 13, 2018
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A phrase that will win you any roast battle. Unless the opponent says,”no u
Timmy: “Hey loser want commit roast battle?

Jimmy:”Yes let’s go.”

Jimmy:”Well I might as well just end it here.Your mum gay”

Timmy:commits dead
by Vscos garbage October 9, 2019
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