From Wiktionary, the free dictionary
Possibly from hairy + Irish malaí (literally “eyebrows”)
hairy molly (plural hairy mollies)
- (Ireland, idiomatic) A hairy caterpillar.[1]
- (Ireland, idiomatic) The vulva.[2]
- ^ Jonathon Green, Cassel's Dictionary of Slang, Weidenfeld & Nicolson, 2005
- ^ Irish Language & Culture, Lonely Planet, 2007