Gun Moll
Definition: the female companion of a male criminal
Keisha, in New Jack City. She had a tendency to shoot people.
A “moll” is a girlfriend or prostitute of a male criminal. Various etymologies state that it’s a shorthand for “Mary” or “Molly,” which was also used to indicate a prostitute.
To be a “gun moll” specifically implies a level of active participation in crime.
Why I Looked It Up
In a description of the characters in New Jack City:
His gang consists of his best friend, Gee Money; enforcer Duh Duh Duh Man; gun moll Keisha; Nino’s girlfriend, Selina; and her tech-savvy cousin, Kareem.
I had seen the term once before describing Christina Hendricks performance in a review of the film Drive:
Disappearing lithely into an extended cameo as a skanky gun moll […]