Knuckle Sandwich 

1.) To strike someone in the mouth with a fist.

2.) To ejaculate "knuckle children" (semen) onto a sandwich and then feed it to some unknowing individual.

1.) Jimmy was running his fucking mouth so I gave him a knuckle sandwich.

2.) Jimmy was running his fucking mouth so I gave him a knuckle sandwich.

You see either way its about the same. In example number one you have punched him in his mouth and example two you have made him ingest your hot and salty jizz.

Knuckle Sandwich by AndyCapp March 25, 2010

knuckle cracker 

A person who cracks his/her knuckles for pure amusement at any time or place.

"Ohh, so you're a KNUCKLE CRACKER eh?"
"Yes I am. So?"
"No comment!"

knuckle cracker by bottleblonde September 8, 2005

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.

knuckle chucking 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.

Knuckle Cluster by chevyboyusa February 4, 2021

Knuckle fucker 

One who graps his penis with his hands in a white knuckle grip and vigorously jacks his cock off.

That David is such a knuckle fucker.

Knuckle fucker by French Admin Guy August 3, 2007

Knuckle Box 

(N.) To be a royal screw up. To be the one to totally fuck things up for others and never be held accountable. To be a slacker and never get fired. One who is void of all intelligence to the point where breathing and blinking stress mental processing speeds.

(V.) Knuckle Boxing: The result of def: (N.). To screw everything up as a knucklebox would. Being unable to identify responsibilities and destroy all confidence in ability. To bitch up the works.

I can't believe B. Kieth knuckle boxed production again!

Bill, you knuckle box! Stop knuckle boxin this shit, BITCH!

Your bitch-ass knuckle box attitude is WEAK!

Knuckle Box by jebediahfloyd October 6, 2006

knuckle rocket 

the cum that lands on your knuckles after masturbation

I was shooting off a knuckle rocket and your mom walked in.

knuckle rocket by pink pig August 21, 2007