pretty penny . pretty penny {n. phr.} A large amount of money. Their new house is so big and modern that we're sure it must have cost them a pretty penny. Categories: add yours money {n. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2025 » In RussianTo section: P Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Add my comment