look up any word, like crust punk:
 
1.
Excrement; turd (see fudge dragon)
"My neighbor never picks up after his dog. Every morning on the way to get the paper I step in a fresh batch of mud muffins."
by R. Bowers October 07, 2012
 
2.
When a girl takes a shit, wipes ass into her vagina and then you eat her out...
dude your mom is FOREVER doing mud muffins in the dark...
by y8 February 19, 2009