1 definition by Mung Master Pete
when eating out someone's asshole, the one getting his/her ass eaten out has diarrhea into the ass eater's mouth, staining his/her lips a shitty brown color
Pete: Phil, why do your lips look like u just ate a turd?
Phil: That bitch last night gave me brown lips!
Phil: That bitch last night gave me brown lips!
by Mung Master Pete October 24, 2006