A gun moll or gangster moll or gangster's moll is the female companion of a male professional criminal. "Gun" was British slang for thief, derived from Yiddish ganef (גנבֿ).[1] "Moll" is also used as a euphemism for a woman prostitute.[2]
^"gun moll", The American Heritage® Dictionary of the English Language, Fifth Edition, Houghton Mifflin Harcourt Publishing Company, 2019
^"moll", The American Heritage® Dictionary of the English Language, Fifth Edition, Houghton Mifflin Harcourt Publishing Company, 2019