scotch broth . scotch broth {n.} A thick barley soup with vegetables and mutton or beef. Mother cooked a hearty scotch broth for dinner. Categories: add yours {n.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: S Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Discuss