talk rot talk rot {v. phr.} To say silly things; talk nonsense. He's talking rot when he says that our company is almost bankrupt. Categories: add yours {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: T Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Add my comment