After getting a mudslide you pull you penis out of her asshole and ejaculate. Your penis is covered in shit like a mountain, the semen gushes out from the shit much like an avalanche or a volcano, rolls down your cock and on to your balls.
After inserting my penis into sally's asshole, i realized she forgot to go to the bathroom that day and I ended up getting a mudslide, witch ended up turning into a snowy avalanche.
by Omar L. April 22, 2006
Todd ejaculated on his girlfriend, pushed her down the stairs, and screamed "SNOWY WHITE AVALANCHE!"
by Xerxes93 October 31, 2011