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motor-mouth

[ moh-ter-mouth ]
/ ˈmoʊ tərˌmaʊθ /
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noun, plural mo·tor-mouths [moh-ter-mouths, mouthz]. /ˈmoʊ tərˌmaʊθs, ˌmaʊðz/. Slang.
a person who is a constant or irrepressible talker.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

British Dictionary definitions for motor-mouth

motormouth
/ (ˈməʊtəˌmaʊθ) /

noun
slang a garrulous person
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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