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when you beat your cock so fucking hard your knuckles are slathered in cum
OMG I had the biggest case of cum knuckles when looking at a picture of ur mom.
When you're wearing a thong, and your balls are so saggy that each ball falls onto both sides of the thong creating newton ball like balls, and you have someone put their tongue in between both balls, and swing the balls together like newton balls. :)
i'm going to Mewtons Knuckle you so hard your taste buds will never work the same.
The outline of the edge of a guy's glans ridge through his underwear or pants.
Check out that guy's gorilla knuckle- he's got it pierced!
Ejaculation from masturbating.
Karsch went home and cooked up a nice bowl of knuckle chowder in the shower
1. The sound you hear after being punched repeatedly. This is usually accomplished by a bully of some sort.
2. The sound of a habitual knuckle-cracker, especially one who is capable of cracking many knuckles at once.
"Oh man, Jimmy's probably hearing a knuckle symphony right now! Lets call an ambulance."
"Hey, man, thanks for the knuckle symphony right there. Really appreciate it."
When fisting someone's anus, and you pull your fist out covered in poop.
I can't believe they didn't clean themselves enough to prevent me from getting monkey knuckles.
Finger fucking a guy's girl under the table at a bar while he is at the table, then punching him in the face afterwards, karate style, with two fingers, like Chuck Norris.
I knuckle cocked that douchebag and took a shot of Jack to top off the night.