To get buck or crazy. Take the current situation to an extreme level. Go nuts.
Dude we got so wasted last night, we were knucked.

I cannot believe Steve jumped off that roof. It was knucked.
by ludaridindubs January 24, 2010
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A synonym to pound it. It is a fist to fist contact in a congratulatory way. Often used to replace a high 5 or shaking hands.
Steve: Hell yeah! This Euro-trip rocks!
Jerry: I know, check out that european ass!
Steve & Jerry: Knucks!
by Benormous April 19, 2006
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The cool way of saying knuckles. An awesome way to ask your friends for a fist touch :)
You should just KNUCK her in the face.

Give me KNUCKS bro.
by smileyshelbz December 26, 2009
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the act of inserting the index finger into the rectum 2 knuckles deep.
Johnny has his finger 2 knuckles deep into his rectum therefore he is knucking
by icecreambandit March 17, 2013
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"I'm buyin' me some brass knucks."
by Dave January 15, 2004
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The action of touching two knuckles..basically a sign of coolness. Also can be used in place of 'the Eff word' :p
Knuck my life, man!

*Walking past friend* KNUCKS! *touch knuckles together*
by Alyssa Knucker November 4, 2009
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