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rum·bus·tious  (rŭm-bŭs'chəs) adj. Uncontrollably exuberant; unruly: "Common to both his illustrations and his independent paintings . . . and lurking below their rumbustious surface, is a sympathy for the vulnerability of the ordinary human being" (Christopher Andreae). [Probably alteration of robustious (influenced by rambunctious).] rum·bus'tious·ly adv., rum·bus'tious·ness n. |