loan shark loan shark {n. phr.} A money lender who charges excessive interest. Why go to a loan shark when you can borrow from the bank at the legal rate? Categories: add yours {n. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: L Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Leave my opinion