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"Ur brother a mother" is a step up from ur dad lesbian. Every time these magic words are said, we as a species traverse deeper into the he'll hole known as extinction.
Assmeister43 : ur mom gey
Kermit_1h3_D: ur dad lesbian
Assmeister43: no u, ur brother a mother

*kermit's house would explode, killing him, and any family inside*
by Waus June 11, 2018
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The biggest roast of all time. Ur mom gay, ur dad lesbian, ur grandmammy tranny, ur grandpap trap, ur sister mister, no u are all inferior.
oofer: ur mom gay
pleb: ur dad lesbian
oofer: no u
pleb: ur grandmammy tranny
oofer: ur sister a mister
pleb: ur grandpap trap
oofer: but ur brother a mother
pleb: *instantly in hell*
by Dropped My Idiot February 1, 2019
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Ur brother be a mother

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The ultimate, by many forbidden, one line to destroy someones will to live
Ur mom gay
Ur dad lesbian
Ur granny tranny
Ur grandpas asexual
Ur sister a mister
Ur brother be a mother
"Sad opera music plays as screen turns black and white"
by Stanoje Glavas March 15, 2018
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Ur brother's A mother

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The ultimate insult. Nothing compares to this. It trumps over ur mom gay, ur dad lesbian, ur granny tranny and makes your grandpap A trap look like "ur stupid".
1: ur mom gay

2: no u

1: well, ur daddy lesbian

2: ur granny tranny

1: noooo, your grandpap A trap

2: you made me do this. (Grows into a giant and raises his hand to the heavens) UR BROTHER'S A MOTHER!!!

(2 brings their hand down and vaporizes 1, then the entire galaxy speeds toward andromeda galaxy at the speed of light, causing a massive black hole that swallows the universe.)
by HappyWalrus May 13, 2018
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Only used as a last weapon vs all others
Dan: Your mom gay
Stan:Ur Dad lesbian
Dan:No Ur granny a Tranny
Stan:Wah no Ur sister a mister
Dan: No U
Stan: Woah You caused this bro ur dead
Dan: Do it pussy you wont
Stan: Ur brother grew up to be ur muther
Dan: Instantly collapes into a black hole and while still alive every partical around him hits him
by T10 Titan March 20, 2018
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urmothersbiggestfan

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an amazing mutual!! very nice to be around flushed
urmothersbiggestfan is an amazing person & mutual 😄
by sinjindrownjng July 5, 2021
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