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 head 

Someone who has just made a mistake or done something wrong. Often used in a joking manner between friends.

After arriving at the ski resort Pat discovered that he had forgot his skis to which his friends responded "Pat, you're a knuckle head!".

knuckle head by zantern July 2, 2005

knuckle tap 

Commonly referred to as dap, a fist on fist greeting traditionally given as a sign of respect. However, "knuckle tap" is most often used amongst Caucasians.

Daniel: "I played a superb match of polo the other day, and I received several knuckle taps!"

knuckle tap by Satch MD December 18, 2007

knuckle butt 

To slip one's knuckle into the crack of an unsuspecting victim. Similar to a credit card but using the knuckle.

When Sally bent down to pick up her shoes, Bryan reach over and gave her the 'ole knuckle butt.

knuckle butt by akellz September 19, 2012

Knuckle driver 

a driver that can only be visable by their knuckles on the wheel as they are either too small or the seat is too far back.

most commonly seen with elderly female drivers or women in mini coopers wearing beatle eye sunglassess.

i nearly got run of the road yesterday. didnt see their face as it was a knuckle driver

Knuckle driver by B247E September 25, 2010

Knuckle-dusting 

V. The act of female masturbation so frequent and furious that one's knuckles become raw from constant friction and moisture.

"While my partner was away for the summer, I spent my days and nights totally knuckle-dusting the shit out of myself".

"The pain of knuckle-dusting is nothing compared to the pain of loneliness and celibacy".

"Knuckle-dusting is the chain-smoking of sex".

Knuckle-dusting by PenePee December 5, 2013

knuckle baby 

n. Male ejaculate resulting from masturbation

Lindsay Lohan posed naked for Playboy, and I gave birth to a knuckle baby.

knuckle baby by peo May 24, 2008