The sexual act of cutting ones knuckle (2-3) and putting their fist in their partners vagina or anus to "claim dominance"
Heath: why are your knuckles cut
Avery: oh... Let's just say I gave my girlfriend a bloody knuckle
Heath:oh my God dude,why?
Going all out as in wrapping knuckles around the motorcycle throttle and reving it up.
I'm going knuckles forward on this project.
Risque. Rude but not completely gross (joke).
"That gag was near the knuckle, man." "I know but still funny wasn't it?"
-I don't like what you're wearing
- Well, tough knuckles!
- My grandmother just died
- Oh, tough knucles
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When someone drinks too much hard spirits, then goes home and attacks there significant other using their fists.
"Chris had way too much to drink at the Recruiting last night, I heard got Rum Knuckles"
"His poor wife, I hope he used the gloves at least this time"
when an obese lady has camel-toe
that camel to is so big its like a moose knuckle
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