mewtons knuckle

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.

by Throbin Hood June 13, 2016

knuckle scrub

The act of vigorously scrubbing one's anus, usually with hot soapy water, to clean it of leftover fecal matter. It is more a practical technique than a pleasurable one, although some people find it serves the dual purpose.

The toilet paper at the resort was of poor quality so I had to hop in the shower and do a quick knuckle scrub before going to dinner.

by Diarrhea Farmer January 12, 2015

cum knuckles

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.

by ryangb871 January 20, 2022

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.

by Eaton Holgoode November 13, 2017

Jack Knuckles

A chronic, habitual masturbator. Someone who is always giving himself a tug. Typically addicted to porn, stalks Facebook, Insta and other media for pics to fap off to.

May also be used as a derogatory term for somone who’s a POS.

My neighbor is a real jack knuckles. He’s always giving himself a wank online.

My uncle is a jack knuckles. I catch him tossing off every time I walk past the den.

Fuck that guy. He’s a jack knuckles.

by Eaton Holgoode December 8, 2017

Knuckle Custard

A busted load of jizz all over your fingers after rubbing one out.

Hand me my gak towel. I need to wipe up this knuckle custard.

I apparently didn’t wipe my hands good after jacking off this morning. I still got knuckle custard on them.

by Eaton Holgoode June 4, 2018

Knuckle Cock

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.

by JDawgBroncos1! May 4, 2019