noun, plural blab·ber·mouths [blab-er-mouthz, -mouths] /ˈblæb ərˌmaʊðz, -ˌmaʊθs/.

a person who talks too much, especially indiscreetly.

Origin of blabbermouth

An Americanism dating back to 1935–40; blabber + mouth

Synonyms for blabbermouth Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for blabbermouth

Contemporary Examples of blabbermouth

  • Why, then, does she bother to lecture a blabbermouth like Jaimee Grubbs or any of Tiger's other mercenary mistresses?

    The Daily Beast logo
    Call Girls Out-Class Mistresses

    Tracy Quan

    December 6, 2009

Historical Examples of blabbermouth

  • Silence that blabbermouth; he does not know what he is talking about.

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


    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

Word Origin and History for blabbermouth

1931, from blabber + mouth (n.).

Online Etymology Dictionary, © 2010 Douglas Harper