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A condition where fecal matter gets on your nutsack after taking a nice healthy shit and then wiping your ass from back to front.
That shit on your underwear doesnt look like skid marks, i bet its from mudnuts!!!
by IBStudent April 02, 2006
To achieve ejaculation within the anus of another.
See "donkey punch"
by Harry Merkin August 06, 2002
Fecal matter mixed with semen in the anus. Primarly used at scat parties. (aka: shemen)
Before arriving at his bi-weekly scat party, jaay mixed up a fresh batch of mudnut in his anus.
by Legendary Films September 28, 2003
doin a girl in the butt then pullin out and shootin it in her mouth.
my hizo wouldnt stop bithcen so i muddnutted her.
by the gavo69 February 12, 2003