don't look a gift horse in the mouth . don't look a gift horse in the mouth See: LOOK A GIFT HORSE IN THE MOUTH. No categories: add yours Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: D Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Discuss