Mud Knuckle 

After taking a poop the average human, chooses to wipe the anus to remove any left over excrement. When in the wiping process if on discovers that fecal matter is left on a finger, he/she has been mud knuckled.

i had some taco bell yesturday, ive been crapping all day, sloppy ones too, i even got mud knuckle it was so bad.

Mud Knuckle by mike lea January 19, 2005

Mud Knuckle 

During anal sex , upon re-entry you bend your hard on and it looks like a bent thunb.

I got a Mud Knuckle while plowing some chick in the ass last night. Hurt like hell.

Mud Knuckle by Dadawggy January 19, 2019

Mud Knuckle 

The Anus

Your Mud Knuckle smells.

Mud Knuckle by Gulies January 25, 2009

Alabama mudknuckle 

The act of cramming your finger (at least to the 3rd knuckle) inside of someones 4th eye. If done correctly and your partners 4th eye is left quivering, your finger should look like an Alabama Mudknuckle!

I will never stop hitting that 4th eye until my finger looks like an Alabama Mudknuckle!

Alabama mudknuckle by Kameron6 November 17, 2021

mudknuckle 

A mudknuckle is when you take a shit, smear your knuckles in it an then punch someone in the face.

Mudknuckles can be also delivered using other people's shit, dog shit, cat shit and/or tiger shit. Basically you can use any poop available.

VARIATIONS:
A Hairy Mudknuckle is when you dip your shit covered knuckles in pubic shavings before punching someone in the face.

A Mudknuckle Favor is when you smear your knuckles in shit and then pee on your knuckles to rinse some of the poop of before punching someone in the face.

Person A: I just got in a fight and now I have shit on my face. What the hell happened?

Person B: Damn B... You just got mudknuckled

mudknuckle by B.Ready December 2, 2010