public enemy . public enemy {n. phr.} A famous criminal. Al Capone of Chicago used to be Public Enemy Number One during prohibition. Categories: add yours {n. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: P Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Leave my opinion