bump off bump off {v.}, {slang} To kill in a violent way; murder in gangster fashion. Hoodlums in a speeding car bumped him off with Tommy guns. Categories: add yours {slang} {v.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: B Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Discuss