cathouse cathouse {n.}, {slang} A house of ill repute, a house of prostitution. Massage parlors are frequently cathouses in disguise. Categories: add yours {n.} {slang} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: C Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Leave my opinion