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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
by CharlesDCR September 03, 2015
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2
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.
by Balls007 July 31, 2003
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