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Cock-Slapping the Mona Lisa 

This expression is supposed to imply a juxtaposition of a crass or offensive action against something that is held as sacrosanct by someone else.

Coined by Ben "Yahtzee" Croshaw
"For four, what the fuck happened to Clive Winston, you pricks?! In his place we've got some multicoloured, giggly J-pop creature, and you can't play classic rock with that...thing. It's like cock-slapping the Mona Lisa."
-Ben "Yahtzee" Croshaw in his Guitar Hero III review

National Cock Slapping Day 

April 7th, national cock slapping day
Michael Agricola: Aye what day is it today?
Dosca: April 7th..
Michael: AHhhhh

April 7th, national cock slapping day

You're Slapping My Cock 

A phrase or expression used to communicate that you think that somebody is lying or "pulling your leg." It basically means that you think somebody is feeding you a pile of bullshit.
Greg: Hey, I won the megamillions lotto today.

Michael: No way, you're slapping my cock.

cock slopping 

where one does not know how to handle the emensity of his/her cock
Stop cock slopping over there and learn how to control that thing

slappin' your cock around 

to waste time, to dawdle, to chat on AIM all day instead of doing homework
langan: do you have any hw today?
amyk: yeah
langan: then why are you slappin your cock around online all day instead of doing it
amy k: oreo

Cockslapping

Cockslapping is the practice is slapping someone's face with your penis, usually when erect. Often performed as a joke, when the recipient is either asleep, stoned, or otherwise incapacitated.
John said he enjoyed cockslapping me last night while I was asleep.
More from Urban Dictionary
anyone who succeeds in disgracing/over indulging themselves in the throws of clubland
28 hours and 4 clubs later, gurning for england but still refusing to go home - a total wrongun!!
wrongun by bevvers March 21, 2007
Word of the Day on October 8, 2026

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026
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