Top definition
the brown poo stains on the inside of one's underwear, when one forgets to wipe, or after a particularly messy bowel movement.

see skid marks
Matt, you need to re-learn how to wipe your butt... I'm getting sick of seeing gutchie stains in your tightie whities...
by RalfieBear July 21, 2010
Happy St. Patties Day!