clean sweep . clean sweep {n. phr.} A complete victory. Our candidate for the United States Senate made a clean sweep over his opponent. Categories: add yours add yours {n. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2025 To section: C Subscribe to: American Idioms► Also consider the parent subscriptions (3)Idioms feedEnglish languageHome page and general feed Comment on this entry Comment on this entry