knuckling up

major shrinkage of a man's penis to the size of a finger between two knuckles

Wow it's cold out, I can barely see my dick, it must be knuckling up.

I don't have a micropenis, it's just knuckling up!

by Nasbaby December 16, 2010

knuckle chucking

The act of aggressively masturbating.
To stroke your cock in a very enthusiastic way.

I could hear the dude in the next stall knuckle chucking .

Mark has been locked in his room knuckle chucking ever since getting home from the strippers.

by Fukucifer August 28, 2017

Knuckle Cluster

The name given to a gathering of lesbians, typically consisting of at least three.

Bro, did you go to that party last night?
Yeah, there were a ton of lesbians, it was a real knuckle cluster.

by chevyboyusa February 05, 2021

Foot knuckling

The art of inserting ones toe up whatever orifice, all the way up to the hilt

Shit me mate......he stuck his toe right up to my tonsils - the dirty low down foot knuckling son of a bitch

by Burtonez September 12, 2009

Swollen Knuckle

The act of pinching one's scrotum between the fingers so a testicle is forced out between the knuckles, resulting in an apparent swollen knuckle.

Dude, I think I broke my finger. (Looking down at Swollen Knuckle) No wait, its just my testicle.

by Phibernaut June 27, 2009

bloody knuckle

When 2 girls are each on their period and scissor each other.

Jen and Pam were both on the rag, and horned up for eachother, so they got into scissor position and bumped the bloody knuckle.

by KNuckle PUck April 24, 2010

fisherman's knuckle

Having sexual intercourse with a woman no more than one hour after an abortion.

Yeah she got rid of the baby, then I fisherman's knuckled her.

by jay-sin ratlips February 03, 2011