Similar in function to that of a traditional "posse," the "prosse" is composed of either real 'working girls' or poorly dressed (and likely intoxicated) women who just make it look like they have sex for money.
1. "I hate leaving my office after dark, the prosse across the street moves in and I'm worried someone will drive by and think I'm picking them up!"
2. "Did you see those girls on the dance floor? I'm not sure where that prosse came from, but they're out in full force tonight!"