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
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 3, 2010

The act of showing nerds some maths/physics etc. problems to distract them from their current task and get them to focus on the problem instead, generally until they solve it.
I ran into some nerds sitting in a maths class yesterday. It's amazing how you can just outright interrupt what they're doing with a simple nerd-whacking calculus problem.
by thepurplbanana December 17, 2018

by Elizabeth Smart October 27, 2003

Someone who needs to be taken out (whacked) for stupidity. A job waiting to happen that saves humanity from genetic disorder.
Man: Dude, Joe is a real idiot.
Man 2: Yeah he is going to get fired sooner or later for all the stupid insane things he does.
Man and Man 2: What a whack job!
Man 2: Yeah he is going to get fired sooner or later for all the stupid insane things he does.
Man and Man 2: What a whack job!
by Todd C. October 5, 2007

D-Tos: Yo eric where you at last night?
ELO: Bush whacking over at MB'S
L-WIL: Damn eric that some fine ass bush whacking
ELO: Bush whacking over at MB'S
L-WIL: Damn eric that some fine ass bush whacking
by Eloree123 June 4, 2013

I went round to Tony's and John was there, so after a few cocktails we decided to have a whack job.
Post sport locker room: Guys, we won! Let's celebrate by having a whack job.
Post sport locker room: Guys, we won! Let's celebrate by having a whack job.
by WaxyBellend January 18, 2011

I got Brazilian Whacked today at Dunks. I ordered a coffee with cream and sugar, they gave me one with milk and NO sugar.
by boiled goose July 6, 2009
