To brandish one's knuckles, usually before a fight or to induce a fight.
I knuck We knuck
You knuck You All knuck
He/She/It knucks They knuck
I knuck We knuck
You knuck You All knuck
He/She/It knucks They knuck
by Ross Owens December 7, 2005

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!
Jerry: I know, check out that european ass!
Steve & Jerry: Knucks!
by Benormous May 1, 2006

Short for brass knuckles.
by Rodney Basil October 5, 2003

by smileyshelbz December 27, 2009

by icecreambandit March 17, 2013

The action of touching two knuckles..basically a sign of coolness. Also can be used in place of 'the Eff word' :p
by Alyssa Knucker December 6, 2009
