stick-up stick-up {n.}, {informal} A robbery by a man with a gun. Mr. Smith was the victim of a stick-up last night. Categories: add yours {informal} {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 Add my comment