noun

• One who slashes.
• A machine for applying size to warp yarns.
• (informal, film) A horror movie with graphic blood and violence; a slasher movie.
• A murderer in such a film.
• One who self-injures by cutting.
• A tool for cutting undergrowth.
• (fandom slang) One who writes slash fiction and/or supports male/male ships.
• (UK, military, historical, slang) A member of the 28th (North Gloucestershire) Regiment of Foot.