smash hit smash hit {n.}, {informal} A very successful play, movie or opera. The school play was a smash hit. 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 Post my comment