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

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 Muck Peanut Butter Top Shelf

In hockey, when a player fakes a forehand shot on goal, but instead of taking the shot, swings around the net, and takes a backhand shot on goal which enters the net in the top corner.

Etymology:

'muck', most likely derived from the sound of hockey skates on ice.

'peanut butter', a sticky, delicious substance, used in this instance due to it's ability to stick to roof of one's mouth and temporarily incapacitate an individual.

'top shelf', refers to the placement of the puck in the net, particularly the top corner.

Commentator: "...he moves to take the shot, but wait, he's faked out the goaltender, he swings around, takes the shot with a backhand slap and... muck muck peanut butter top shelf, he scores!"

Crowd: /raucous applause/

Muck Muck Peanut Butter Top Shelf by Romance77 March 4, 2010

muckbutter 

Thick scum from the bottom of your lungs.

I just knocked over my cup of muckbutter

Muckbutter does not go good on eggs, it’s better on toast.

muckbutter by BlackLungJones September 9, 2023