knuckle butter 

Noun, the slimy substance that seeps out from between the fingers of a closed fist after a person has ejaculated in their own hand.

Jack used a tissue to wipe the knuckle butter off of his hand after he jacked off.

knuckle butter by Bentrok May 9, 2006

knuckle butter 

When you fist a girls asshole then switch to her pussy and the butt/pussy juices mix to create a tan frothy cream.

"After I fisted my girls butt i switched to da pussy, my wrist was drippin with knuckle butter son!"

knuckle butter by IAbmx May 12, 2015

Knuckle-Butter

The peanut butter that ends up on your knuckles when your knife/spoon is shorter than the jar.

This tiny plastic knife is no match against that big ass jar of Jiff. Got me covered in the knuckle-butter...

Knuckle-Butter by Grandmaster Dave November 27, 2017

peanut butter knuckle fuck

When another person, or animal, licks peanut butter off your balls while you jerk off.

Man, my girl gave me a peanut butter knuckle fuck last night.

peanut butter knuckle fuck by Britt Charnock March 6, 2017

Butter Knuckles 

The way your knuckles look after eating a popcorn from the bag. "usually dark yellow"

i was riding my bike and noticed i had Butter Knuckles

Butter Knuckles by tophercat9 July 11, 2010

butter knuckles 

the way your knuckles look after eating popcorn from the bag. (: which is usually this dark yellow color.

i was riding my bike innocently one day, then i suddenly realised i had butter knuckles!

butter knuckles by tophercat9. July 11, 2010

Knucklebuster

A car, usually an old American car (1930's-1970's) who seems determined to skin, slice, and slash the hands of every mechanic who touches it, regardless of their skill-level. Resistant to tools, penetrating oils, vice grips, and laws of physics. Any bolt that is in this car will STAY in this car, whether you want it there or not, and if you try to remove it, it WILL break off, and leave you requiring 15 stitches in the process.

Holy Hell.........that '49 Mercury just tore my whole hand open, and all I was trying to do was change her damn oil!! What a knucklebuster!!

Knucklebuster by crackedheads666 August 2, 2010