[ big-mouth ]
/ ˈbɪgˌmaʊθ /
noun, plural big·mouths [big-mouth z, -mouths] /ˈbɪgˌmaʊðz, -ˌmaʊθs/ for 1; (especially collectively) big·mouth, (especially referring to two or more kinds or species) big·mouths for 2.
a loud, talkative person, especially one who lacks discretion.
any of several fishes having an unusually large mouth.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for big mouth
/ (ˈbɪɡˌmaʊθ) /
slang a noisy, indiscreet, or boastful person
Derived Formsbig-mouthed, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012