knuckle sandwich 

what i give to ur mom's ass

My knuckle sandwich in your mother's anal orifice

knuckle sandwich by dave November 8, 2004

Knuckle headed catfish 

Really cool explitive that is not much of an explitive. Some thing I came up with in college and hope it sweeps the nation like wild fire.

Did you see your test score?

No...let me see...aw Knuckle Headed Catfish

Knuckle headed catfish by Cranky1234567890 May 9, 2006

Knuckle Down 

To have a firm grip on ones cock and sucking them off with your knuckle's bulging out of your hand to show your hard work.

Heather popped a vein in her hand after she knuckled down hard on Mikie!!!

Knuckle Down by Insane V April 2, 2004

knuckle-grinder 

a name for a snowboarder

Skiers are way cooler than knuckle-grinders.

knuckle-grinder by telechick December 25, 2007

knuckle burn 

When you put one of your knuckles on a pussy and virgourously rub until the pussy and knuckle become raw.

Bro I can't believe Samantha took that knuckle burn so well, I still have 3rd degree burns on my knuckles.

knuckle burn by Penisgrasper69 August 4, 2017

Knuckle Up

The Act Of Whupping Someone's Ass!

BITCH All In My FACE We Bout 2 KNUCKLE UP In Did Bitch!!!

Knuckle Up by MS. BOUNCE DAT AZZ July 12, 2006

knuckle fucking 

the art of bending one over the knuckles (the things that hold the train togather) of a stopped train and screweing the shit out of them and finishing before the train takes off and kills you.

pam was looking good at work today so after work we went to the bar and ended up knuckle fucking.

knuckle fucking by Uncle chester the molester March 2, 2009