dirty knuckler 

This is horrible abuse to do to a person. You rub your knuckle against either your own, your victim's, or a third parties butthole then proceed to rub your "dirty knuckle" against your victim's mouth.

Tiffany: "Danny, if you don't stop making fun of my nips, I'm gonna give you the dirty knuckler!"
Danny: "NAY!"

dirty knuckler by thecottoncandypinkprincess September 28, 2011

dirty knuckle

verb; when you forcefully go knuckle and/ or wrist deep to successfully penetrate ones' anus. (leaving you with dirty knuckle)

Sean- "what the f**k is on your hands?

Kevin- "I gave my girl a dirty knuckle last night, I guess I missed a spot"

dirty knuckle by big pimp nasty September 15, 2013

dirty moose knuckle 

A fat chicks dirty pussy

Damn look her dirty moose knuckle

dirty moose knuckle by Anggelos April 7, 2015

dirt knuckle 

(Noun) The result of poor quality toilet paper when moderate force is used to wipe one's butt

(Noun) A person who regularly sticks their finger in a butt for personal pleasure and/or the pleasure of others e.g. "dirt knuckler"

(Verb) The inadvertent act of penetrating the toilet paper while wiping a butt e.g. "dirt knuckled" "dirt knuckling"

I got a nasty dirt knuckle after crapping on a plane.

There he goes with his finger in his butt again. He's such a dirt knuckler.

Guess I wiped my butt a little too hard because I ended up dirt knuckling.

dirt knuckle by Mr. Dirt Knuckle October 21, 2009