moll Share definition Flag noun. Slang word from Gangland-era America that meant an attractive young woman. It was often used to describe a "gangster"'s love interest. Slick Dan's moll is a fox, but don't let him catch you looking, Joe. moll by Sam Spade January 14, 2006 0 0 Get merch Get the moll mug. Buy Now — $32.95 See more merch