in a lather . in a lather {adj.}, {slang} In great excitement; all worked up; extremely agitated. I couldn't get across to Joe, he was all in a lather. Categories: add yours {adj.} {slang} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: I Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Comment on this entry