Pronunciation: (big'mouth"), [key]
—pl. -mouthsPronunciation: (-mou&thslash;z", -mouths") [key] for 1; (esp. collectively) -mouth, (esp. referring to two or more kinds or species) -mouths for 2.
1. a loud, talkative person, esp. one who lacks discretion.
2. any of several fishes having an unusually large mouth.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.