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This term is also used in French to tell someone is completly drunk and / or under drugs.

Note that in French, you write it : 'Défoncé' if he's a guy or 'Défoncée' if she's a girl.
Il/elle est complètement Defonce
Defonce by CharlesDCR September 3, 2015

Deyoncé 

In the same way that Sasha Fierce is the alter ego of the bootylicious Beyoncé, Deyoncé is the alter ego of Dana.

In 1996, Dana was born and named Dana. She grew into her alter ego quite recently and is known world wide by Deyoncé.

A Deyoncé is also fierce and beautiful woman. Often praised by everyone she ever meets. She is good at everything and is probably good at sports like quidditch. Bow down.
person 1: who is that girl she is bootylicious woah
person 2: ya man she is Deyoncé
Deyoncé by beyonce potter holla November 9, 2013

Deconception 

Opposite of conception. Being fucked by life causing one to die or wish death upon oneself.
Guy 1: Dude you up for drinking bleach tonight and getting the f**k outta here?

Guy 2: Nah man, I'm more into natural deconception techniques.
Deconception by CharleselrahC January 18, 2018
A bad bihhhhhhh. Doesn’t take nothing from no one. Always the funniest person in the room and a lot friend
Anytime I talk to Dejonea I laugh till I can’t breathe
dejonea by KabzTheKween October 26, 2019
French term commonly used in pornography to describe brutal penetration. Also a term used for fucking something up.
As oui defonce moi. "oh yes fuck me hard"
Jais Defoncer mon ordinateur. I fucked up my computer.
Defonce by Balls007 July 31, 2003

Defoncé Vu

The feeling a band gets from seeing a familiar place because they were just there. This is due to a tour booked by Dan Defonce and his shitty routing.
"There's that love's we just stayed at. Got a severe case of Defoncé Vu right now."

"Just got Defoncé Vu again, driving through Seattle for the 2nd time in 2 days."
Defoncé Vu by MerchBoi69 February 17, 2020