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.
by Scamtrack September 24, 2016

The residue left around the bell end of the penis after anal sex. Generally, an amalgam of fecal remnants, cum and booty juice. Known for its ripe, pungent odor.
She went right down on it after anal braaaahhhh. Didn’t even wipe off the duck muck.
Hey braaaaaahhh. Tell your mom to wipe the duck muck off her lips before she comes see me later.
Roger has a lot of duck muck under his foreskin.
Hey braaaaaahhh. Tell your mom to wipe the duck muck off her lips before she comes see me later.
Roger has a lot of duck muck under his foreskin.
by Eaton Holgoode October 25, 2017

by Abowdz December 1, 2011

by Tiberius June 16, 2021

Ally told me gally was mucking crust all night until she completed.
Gally was mucking crust until ally’s completion.
Gally was mucking crust until ally’s completion.
by DuqD3Puck October 6, 2021

by Telephony April 16, 2015

by Tizzi Colton August 11, 2009
