8 definitions by LeonidasWV
The concoction resulting from the act of "jumming" (ejaculating in someone else's juice). Combination of the words "juice" and "cum."
Glenn: Dude, I totally jizzed in your juicebox. Haha!
Band Geek: Not cool. First my mouthpiece, now this jum? I hate you!
Band Geek: Not cool. First my mouthpiece, now this jum? I hate you!
by LeonidasWV December 28, 2005
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