munchie noun3 •(informal) A snack.Another homemade mix treat that any youngster will love—a big jar filled with Country-style Granola. It can be eaten as a “munchie” or a cereal, or used in a recipe for cookies or apple crisp. — 1978 •(Internet, offensive) A person who exhibits Münchausen syndrome; a person who feigns a disorder. •(Ireland) A person who lives in a Gaeltacht area of Ireland. formsmunchies