To masturbate. Jack off. Rub one out.
Roger was late to class because he stopped at the bathroom to knuckle one.
I had to knuckle one to your mom last night.
When an fat dumpy lesbian beats herself off and since she's so fat she aggressively rubs her knuckles on her puss to get off
Patti couldn't get the job done with her dildo so she ended up knuckling one off on that big fat pussy
The same as Jerking off or the 5 Knuckle Shuffle
Did you hear Nic Pledged a Fraternity?
Yaa now he sleeps and showers with 50 guys in the same room. He said he has to go into the bathroom to Knuckle one off!
This happens when a person that you are finger fucking .....with one finger.....your finger fucking finger....gets off when you only stick one knuckle in and they orgasm.
She's a one knuckle fuck!!! I didn't even get off!!!
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When a pussy buckles from a one knuckle love tap!
Brina buckled from a slight graze from the one knuckle an hunches over red in the face wondering why no one ask if she's ok.(One knuckle buckle) small hit from one knuckle of the hand