The sound made when stealing something right out from under someone's nose.
Joe: Hey man, I just picked up a bag.
Wayne: Hey, what's that?!! (yells out and points up while grabbing bag and putting it in his pocket)
**SCHUMP**
Joe: Hey man, where is my bag?
Wayne: I don't know! What just happened?
by Bo Nana August 18, 2007
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The skin that may hang off your elbow.
The schump is sometimes also called a weenus.
by OllieS May 31, 2007
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