The act of shamelessly pleasuring ones self in the bathroom at your place of employment. If you’re good enough for a stall you’re too good to be Crumpin Off
“Did you hear dean was Crumpin Off?”

Yeah dude was beating his dick at the urinal.”
by Neil Cicierega August 11, 2018
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The instance of a set of buttocks jiggling uncontrollably, esp. during sex.
Ben: "That looks like some booty crumpin' to me, man."
Chris: "Oh fuck, yeah."
by mckrider November 7, 2009
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When two SERIOUSLY ugly people have sex.

The darker side of "bumping uglies"
Q: Where's Fat G.?

A: He got all boozed up and went home with that nasty chick who was hanging all over him. They're probably crumpin' fuglies as we speak.
by da' guv January 8, 2011
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Crumpin’ is the new fuck. It’s aggressive, it tastes good in your mouth, it describes with excitement. Crumply is also used interchangeably
That shit is Crumpin’! That sandwich is looking crumply
by CrumpinBitch April 6, 2022
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Pleasuring ones self shamelessly in the bathroom at your place of employment. If you’re good enough to blow your load in a stall you’re not Crumpin Off. This act of self degradation is exclusively preformed at a urinal for the world to see.
“Dude did you hear was Dean jackin the beanstalk in the bathroom?”

“Yeah man, he was beatin that dick like it owed him money. Dude was straight Crumpin Off!”
by Neil Cicierega August 11, 2018
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