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[blab-er-mouth] /ˈblæb ərˌmaʊθ/
noun, plural blabbermouths
[blab-er-mouth z, -mouths] /ˈblæb ərˌmaʊðz, -ˌmaʊθs/ (Show IPA)
a person who talks too much, especially indiscreetly.
Origin of blabbermouth
An Americanism dating back to 1935-40; blabber + mouth
gossip, gossipmonger, busybody, talebearer, bigmouth, tattler. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for blabbermouth
Contemporary Examples
Historical Examples
  • Silence that blabbermouth; he does not know what he is talking about.

  • Pelton muttered: "Why Frank sponsors that blabbermouth of a Mongery—"

    Null-ABC Henry Beam Piper and John Joseph McGuire
  • "I thought you'd managed to get that blabbermouth transposed to PolTerm," Zostha said.

    Time Crime H. Beam Piper
British Dictionary definitions for blabbermouth


(informal) a person who talks too much or indiscreetly
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
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Word Origin and History for blabbermouth

1931, from blabber + mouth (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for blabbermouth



A person who talks too much, esp one who reveals personal or secret matters indiscreetly; bigmouth •Blabmouth is found in the mid1920s: The blabbermouths are likely to have the whole wretched truth beat out of them (mid-1930s+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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