dirt wings
The brown wing-like stain you get on your face from eating someones ass.
I tossed my girls salad last night and when I woke up I had a nasty pair of dirt wings!
dirt on a wing
When a beautiful, clean little girl has been exposed to filth and can never be cleansed. Her life has been ruined beyond repair and will never have any meaning other than cock in mouth.
Julie was such a nice girl until Lonnie started pumping her, and then she became a filthy dirt on a wing.