pin one's faith on . pin one's faith on {v. phr.} To depend upon; trust. We pinned our faith on our home basketball team to win the state finals, and they did! Categories: add yours {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: P Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Leave my opinion