fall due fall due or come or become due {v. phr.} To reach the time when a bill or invoice is to be paid. Our car payment falls due on the first of every month. Categories: add yours time {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2025 To section: F Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Discuss