Trunk Knuckle

Sticking a finger in someone's ass at least to the second knuckle of your finger of first knuckle of your thumb.

Hey, that dude really likes when his girl gives him a trunk knuckle around back while getting a blowie.

by Sarcastication January 26, 2013

Monkey Knuckle

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.

by unrealism September 06, 2021

Gorilla Knuckle

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!

by merkinmuncher October 31, 2013

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 05, 2019

Knuckle Bine

The hottest man of Hunter x Hunter ever in the world of Hunter x Hunter. Also the most underrated

Me: Bruh, I'd let Knuckle Bine get it.

You: Dang me too. you have immaculate taste.

by A total and utterly baddie March 25, 2021

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 08, 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 May 11, 2018