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Probably one of the most hurtful insults that can cross your tongue. Used only in extreme circumstances to completely obliterate the other person.
Person 1: β€œI just stole your memes.”

Person 2: β€œwell ur mum gay.”

Person 1: *dies*
by OmeletteBoy 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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"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"

via giphy
by sprrite March 13, 2018
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It is the best roast in the land, it works in any situation and will leave the person your talking to speechless
Ben: yo brayden how are you
Brayden: ur mum gay

everyone: ROASTEDDDD!!
Ben: bro that was not necessary
Brayden: ur mum still gay

Ben: ur fat

Brayden: ur mum so fat its gay
by Dag... May 06, 2019
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The most hurtful thing u could say to a human
Nigga 1:Bro lemme hit ur juul

Nigga 2:uR MUm gAY
Nigga 1:😳😒
by Husky nigga March 03, 2018
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The ultimate comback. When ever you're in a sticky situation, say this one line.
πŸ…±πŸ…Ύβ„Ή 1 : I fucked your mom
πŸ…±πŸ…Ύβ„Ή 2 : oh yeah ? well urmumgay
via giphy
by theultimatebean May 18, 2018
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