look up any word, like dirty sanchez:
 
2.
The act of spitting the poo that your partner unexpectedly deposited in your mouth during a rim job (analingus) back in his mouth. Some people may like this, but, in general, it is thought to be an act used to get back at a guy for pooing in your mouth without warning.
Allison: Mid-rim job, he pooped in my mouth without any warning, so I decided mud blowing was the best way to get the punk back.

Katherine: He shouldn't have at that second Fiber One bar...
by AnnieJames January 24, 2011
 
1.
like snowblowing, but ... muddier
woman eats out man's ass, then makes out with man, without cleaning out her mouth
by drigz March 01, 2004