bite one's lips . bite one's lips {v. phr.} To force oneself to remain silent and not to reveal one's feelings. I had to bite my lips when I heard my boss give the wrong orders. Categories: add yours {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: B Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Discuss