A dangerous combination of fart and wet shits, often starting as abundant gas that rapidly transitions into lumpy diarrhea. Victims require an immediate change of underpants.
Ahhh! I just shat myself! That fart was gasarrhea! I need an underoo change STAT!
by buddy love? February 13, 2008
1. excessive and uncontrollable flatulence
Hell no will I get in the car with you and your gasarrhea!
by mestisa July 01, 2010