Someone who is foul and disgusting in appearance, attitude, speech and/or deedeven by ghetto standards.
Darnelle: I got busy with dis bitch last night, Yo! She did everything! She pissed on me, threw up in my mouth, shit on my chest, and put big ass beads in my ass!
Tavone: And you came here without a bath?! Damn, D! Get yo' nasty ass away from me, Yo!