bottom bitch noun the pimp’s favourite of the prostitutes working for him; the leader of the prostitutes US,1967
Oliver had assured her that she was his top bitch but demanded to know why she couldn’t catch as many dates as Alice, his bottom bitch. — Joseph Wambaugh, Floaters, p. 67, 1996
Now, that’s bottom bitch right there. — HustleandFlow, 2004