Top Definition
Word that makes people forget what you were saying.
Ron: Last night I wanked it so hard!
Matt: What?!
Ron: Whiz'm!
Matt: I can't remember what you just said...
by Matt December 12, 2003
the admixture of piss and semen
Whizm is something that just happens; it's rarely spoken.
by coufal November 25, 2007
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