What is "gangster's moll"

Usage examples of "gangster's moll".

They said you were on the run, made me out to be a gangster's moll who didn't know where her gangster was.

I'm like that famous gangster's moll, you know, who bruised easy but healed quick.

When her uncle, Don Bruce, first dumped her on me, she was all set to play a gangster's moll.

Didn't some famous gangster's moll wear a red dress when she turned him in?