Butt Muck 

The act of pilfering one's asshole while they are asleep or without permission. Also known as Rape.

I butt mucked the fuck outta that bitch last night.

Butt Muck by shanagains9211 April 18, 2019

muck butt 

Muck Butt - the dirty, slimy, stinky, sweaty, itchy feeling you get in your ass crack after going too long without bathing. Usually occurs after long backpacking trips, or in people with poor showering habits.

After backpacking for a week without bathing, Jason couldn't wait to get home and clean his muck butt.

muck butt by Scamtrack September 24, 2016

Mucker butt 

A Mucker butt is a flat ass that one usually sees on Native American females.....

Looks at Carmela, She has a mucker butt.If it was any flatter, it could be used for drawing a straight line

Mucker butt by Seth Mythrax January 12, 2019

Buttmuck 

1) Buttmuck - When you don't wipe well after a dump, you see Buttmuck stains on your tighty whities.
2) Buttmuck - You go to sit down on an old couch and there's an undefinable smear. More than likely, someone else left their Buttmuck on that old couch.

You: "Hey, what's this stuff on your couch?"

Your friend: "oh, someone apparently sharted and left Buttmuck on my couch!"

Buttmuck by haykeydammit September 21, 2009