slipup . slipup {n.} A mistake. "I'm sorry, sir. That was an unfortunate slipup," the barber said when he scratched the client's face. Categories: add yours {n.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: S Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Post my comment