rain on . rain on {v. phr.}, {slang} To bring misfortune to (someone); to complain to (someone) about one's bad luck. Don't rain on me. Categories: add yours {slang} {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 » In RussianTo section: R Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Comment on this entry