Meaning

noun a small replica of a person; used as a toy

noun informal terms for a (young) woman

originFrom Doll, pet form of the given name Dorothy. Etymology 1, noun sense 7 was coined and popularized by American writer Jacqueline Susann in 1966 through her book Valley of the Dolls (1966) and the film adaptation Valley of the Dolls (1967).

Etymology from Wiktionary, CC BY-SA 3.0