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noun, plural loud·mouths [loud-mouth z, -mouths] /ˈlaʊdˌmaʊðz, -ˌmaʊθs/.
  1. a loudmouthed person.
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Origin of loudmouth

First recorded in 1660–70; loud + mouth
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for loudmouth


noun informal
  1. a person who brags or talks too loudly
  2. a person who is gossipy or tactless
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Derived Formsloudmouthed (ˈlaʊdˌmaʊðd, -ˌmaʊθt), 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

Word Origin and History for loudmouth


also loud-mouth, "loud or talkative person," 1872, from loud (adj.) + mouth (n.).

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Online Etymology Dictionary, © 2010 Douglas Harper