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V. To slap or whack a person in the face with your penis. Normally leaves a mark, also known as a mushroom tattoo. Sometimes done during a blow job if it is a bad one, as to punish the person for doing a bad job.
EX1: Dude i was walking down the street when some guy yelled "SHROOM WHACK" and then i got slapped with his cock!
EX2:Bob- Dude I shroom whacked her so hard last night, it left a mark.
Jim- big deal, i shroom whack my lady every night.
Also see cock slap
by Shroom whacker April 03, 2010
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Sep 8 Word of the Day
A casual invitation / threat used by an individual that is not afraid of fucking someone up.
PAUL: I'm going to beat your ass.

JACK: Fuck around and find out, fool!
by NX STARCHILD October 16, 2020
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