do duty for do duty for {v. phr.} To substitute for; act in place of. The bench often does duty for a table. Categories: add yours {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 » In RussianTo section: D Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Add my comment