Tomfoolery, mischief, or other nefarious activities, often illegal
Tom: hey i'm having people over this saturday. we're going to kidnap a stripper. wanna come?

Bill: i don't know... i'm not usually one for shenanigans
by jibblesqid December 2, 2010
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An official declaration made by patrons of an establishment who feel they have been cheated. Once a charge of shenanigans has been accepted by an authority figure, said patrons are free to assault the owners of said establishment with brooms.
"Man, this WoW GM busted my ass for duping items, and then I catch him hooking one of his friends up with free gold. I'm calling shenanigans!"
by Zeltaen November 2, 2005
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To manipulate or transform through shenanigans and/or tomfoolery
Gent 1: Dude, why is the refrigerator inside the couch?

Gent 2: You ate my left overs, so I decided to shenaniganize the hell out of your fridge. We're even now.
by Doc Balance June 13, 2012
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Tricks, jokes, acts, doing and playing fun pranks on people, having fun, doing crazy fun stuff that you wouldn't normally do on a daily basis
Look at them and their crazy Shenanigans!
by BounceOnBy March 25, 2019
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Condition of having an insatiable urge to play pranks,jokes, or evil and malicious acts on others.
Bob awoke today with shenaniganitis and proceeded to plot evil malicious deeds.
by Fish-Shrimpkiss April 25, 2007
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A form of calling somebodys lie, rather than saying "bullshit."
Jack: Dude where were you yesterday?

Tom: I was at a funeral in Virginia all day man, im sorry i couldnt come over.

Jack: I call shenanigans, i saw you walking down the sidewalk yesterday.
by killerFuzzball October 29, 2008
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