jaws tight . jaws tight {adj.}, {slang}, {informal} Angry; uptight; tense. Why are you getting your jaws so tight? Categories: add yours {adj.} {informal} {slang} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: J Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Add my comment