screw-up . screw-up {n.} A mistake; an error; a confusing mess. "What a screw-up!" the manager cried, when he realized that the bills were sent to the wrong customers. Categories: add yours mistake {n.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 » In RussianTo section: S Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Add my comment