dead loss . dead loss {n. phr.} A total waste; a complete loss. Our investment in Jack's company turned out to be a dead loss. Categories: add yours {n. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: D Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Discuss