beauty sleep beauty sleep {n.} A nap or rest taken to improve the appearance. She took her beauty sleep before the party. Many famous beauties take a beauty sleep every day. Categories: add yours {n.} 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