bottom bitch

noun2

1. •
   (vulgar, offensive) The most successful prostitute under a particular pimp, who has higher status but more responsibilities.

   • A Bottom Bitch has a social status above the rest of the girls — 2002
2. •
   (slang, vulgar) A particularly submissive sex partner, especially a gay male.

   • "I'm your bottom bitch." He pushed his dick back in and started stroking her with everything he had. — 2008