A knuckles is a person who is a bad ass often using the catch phrase H.X.C (Hardcore) or often saying: Yo Yo Yo B Boy That Shits for Real Mutha Fucka’, for Shit, Bitch…Fuckin’ Ass and Blab Blab. Knuckles is also a sexual move where you shove your whole fist into a women's ass and say one or both of the two aforementioned catch phrases.
by John Romans December 8, 2007
by Joe-Nay June 27, 2006
She said that she had never done any anal sex. But when I was knuckling her, I knew that she was lying.
by Gatz, Stewart January 19, 2011
by Mixmaster Jazzy G April 1, 2004
wassssssssapp my knuckle?
by sam123123 September 10, 2006
by JoOordan October 21, 2007
Shit man, don't touch that bike or Knuckle over there is gonna come over and explain his name all over your face.
by Cap'nJack March 16, 2007