To insert one's fist into another's vagina and punch with force, grinding your knuckles against their insides.
"I did some mad knuckle grinding on this one chick last night!"
Referring to a person who performs various acts with their hands on a penis
That girl there has some serious dick-knuckles, she'll jerk you 10 ways to Sunday
its not punching, its when you fuck someone hard in the face....with your knuckles
johnny t-bagged my roommate and then left with the pizza so when he came back looking to borrow some money, i knuckle fucked the shit out of his face
1)fuck a girl
2)pull out
3)jerk it
4)let your cum drip down your knuckles
5)punch the girl in the face
girlfriends brother talking to husband-"yo nigga! whys my sisters face all bruised and bloody???"
husband-"oh that...yeah i gave her the brass knuckles last night."
Hey, look at dude in the speedo.....Wow hes got some nasty camel knuckle!
During a television broadcast of a movie, when a character tries to display the middle finger, the finger is cutoff because of censorship. This results in what appears to be the character showing his/her knuckles only. Considered an insult in many parts of a certain part of a certain place of certain countries. Also known as giving knuckles or showing the knuckles.
When watching 8 Mile on VH1, Eminem can be seen giving the knuckles numerous times throughout the movie.
Person 1: Yo, homeboy juss' foun' out dat hims friend was dippin' in him's mayonnaise!
Person 2: Oh snap, he juss' gave him knuckles!
Person 1: Yeah, I would too if someone was dippin' in mah mayonnaise. Bish, gitcho' own damn mayonnaise!