/ Dictionary / Index M mouthy: Meaning and Definition of Find definitions for: mouth•y Pronunciation: (mou'ē, -thē), [key] — mouth•i•er, mouth•i•est. garrulous, often in a bombastic manner. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mouth-watering mouton Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language