Green’s Dictionary of Slang

stable n.

(US)

1. [20C+] any group of people working under one manager.

2. [1920s+] a group of prostitutes working for a pimp; occas. referring to heterosexual males.

3. [1960s] (US) a group of regular prostitute’s clients.

4. [1980s] (US) on model of sense 2, a sadist’s collection of masochists.

In compounds

stable boss (n.) [boss n.2 (1)]

[1930s–40s] (US Und.) a pimp who runs a string of prostitutes.

stable sister (n.)

[1970s] (US black) one of a group of prostitutes working for a single pimp.