Breadcrumb Home > Dictionary > Index B bigmouth: Meaning and Definition of Find definitions for: big•mouth Pronunciation: (big'mouth"), [key] — pl. -mouths -mouth, -mouths a loud, talkative person, esp. one who lacks discretion. any of several fishes having an unusually large mouth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. big mama bigmouth buffalofish TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: limpid Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language