turn turtle turn turtle {v. phr.} To turn upside down. The car skidded on the ice and turned turtle. Categories: add yours {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2025 To section: T Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Add my comment