slut, sluttish, slutty 1. A person, especially a woman, considered sexually promiscuous. 2. A female prostitute. 3. A slovenly woman; a slattern: a prostitute who attracts customers by walking the streets, or a reference to a dirty untidy woman. 4. Casual and unrestrained in sexual behavior. 5. Etymology: from 1402, 'a dirty, slovenly, or untid... Found on http://www.wordinfo.info/words/index/info/view_unit/3704/3