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Another very bad variation of ur mom that is generally used when speaking about incest but can also be used in many other situations.

Warning: using this variation of the common phrase "ur mom" may cause confusion due to it's unpopularity.
John: hey bro, what's up?
Dick: ur cousin

John: what?
by Pika Pika bitch August 05, 2018
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some one your friend sleeps with or a come back to literally any thing
you:i just ate pizza
me:i just ate your cousin
by Unknown_Entity November 11, 2018
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