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
When fisting is just a few knuckles away from actually happening and the pussy region suffers from knuckle abrasion
by K#1 March 23, 2008