A stain on your clothing, most commonly on your undergarments, consisting of some combination of urine, feces, vomit and semen. Usually found after a night of blackout level drinking.
I can't remember what happened last night after the twelfth shot of tequila, and I woke up with a seabstain all over the front of my pants.
by duffgita March 1, 2010
Get the seabstainmug.