large order . large order {n. phr.} Difficult job; a difficult task to fulfill. It is a large order to educate three children in college at the same time. Compare: TALL ORDER. Categories: add yours time {n. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2025 To section: L Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Comment on this entry