meatball . meatball {n.}, {slang} A dull, boring, slow-witted, or uninteresting person. You'll never get an interesting story out of that meatball — stop inviting him. Categories: add yours {n.} {slang} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: M Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Add my comment