One knuckler 

Extremely fat girl whose vagina has collapsed in on itself from all the weight. Thus, fingering ends at the male's first knuckle.

I tried to finger fat Lisa the other night, but it wasn't workin out. She's either a one knuckler or 12.

One knuckler by Curly Ball Hairz January 14, 2015

one knuckle fuck 

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!!!

one knuckle fuck by JoeyBomm July 11, 2020

one knuckle buckle

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

one knuckle buckle by DRED April 19, 2018

Knuckle one off 

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!

Knuckle one off by Mr Shocker September 9, 2009

Knuckle One 

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.

Knuckle One by Eaton Holgoode November 13, 2017

Throwing one over the knuckles 

When a male is masturbating and the jizz runs down over his knuckles after he has blown his load.

Mike needed half a box of Kleenex after throwing one over the knuckles.

Throwing one over the knuckles by Meromero May 5, 2017

the five finger knuckle shuffle on the one-eyed, blue-veined, purple-headed, custard-chucking, salty yogurt slinger.

Yeah, people actually do use this term, but they get it wrong mostlys.

The five finger, knu... aaawwww, fuck it. I whacked off.

the five finger knuckle shuffle on the one-eyed, blue-veined, purple-headed, custard-chucking, salty yogurt slinger. by Gumba Gumba March 15, 2004