The vertabrae on your neck between your shoulders
Climb on my shoulders and sit on my neck knuckle
Fisting someone (usually a threat)
I'm gonna give you knuckle flowers if you don't tell me the truth!
When you are knuckle deep in your own asshole and then you lick it then shove it u yo bitches nose hole.
"Dude yesterday she didn't want to do anal so I hit her with the cock knuckle."
"Me next?"
When you're fucking your bitch and when she goes to sit back on that dick and then it snaps and the area where it snaps forms a hard tight knot and causes your dick to have a permanent bend in it.
"Dude, that bitch threw that ass back so hard, she gave me a cock knuckle."
A crusty knuckle is when you have your girl stimulate your prostate by shoving her middle finger up your anus. Look at her knuckle once she is done.
I blew a load so hard while Christina was giving me a Crusty Knuckle.
A term for a woman's clitoris. Because of its location in between the legs, it almost resembles a knuckle on a hand in between two fingers.
I got her off by rubbing her crotch knuckle.