your moms dead outside

New York slang for 'your moms outside right now'
by r fly March 20, 2018
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The ultimate response to the ever classic insult 'Your mom.'
Person A: Hey dude, sup?

Person B: YOUR MOM IS UP!

Person A: Dude, that's not funny, my mom's dead.

Person B now either believes you, is confused/apologetic, or smart enough to prove the ultimate response to this; Yeah? I really like that.
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