From Longman Dictionary of Contemporary Englishmollmoll /mɒl $ mɑːl/ noun [countable] especially American English old-fashioned informalSCC a criminal’s girlfriend a gangster’s moll
Examples from the Corpus
moll• In Dennis's presence I became an outlaw once again, and Karen my moll.• Dianne Wiest has her moments, though, as a fluffy gangster's moll with claws of steel.• There was a loner and a lady schoolmarm, and she turned gangster's moll.Origin moll (1600-1700) Moll a female name 