When your titties are as hard as knuckles.
Man, he has a case of titty knuckles.
To not put up with, tolerate or endure.
"He is was looked at in awe for his disagreement to knuckle under"
when you fist someone with a handful of popping candy
I gave Ellis the knuckle cluster behind maccies last night
to street fight, throw hands, box, or brawl.
Dam my hand hurts...we'll that's what happens when you throw knuckles!
v. The act of a female punching a person (male or female) in the face. punch
"Julia knuckle slapped that bitch kissing her boyfriend."
The knuckle in which you use to barf with. Normally used by people who are anorexic or just need to blow chunks.
Dude One: "Man, have you seen that chicks barf knuckle?"
Dude Two: "Yeah man, she needs to tone it down, it is starting to callus"
Dude One: "Thats gross man."
The term used for a vagina so large that your whole hand is in the vagina banging your mom.
I totally had to knuckle bang that hoe because her vag was ruined