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big mouth

 - 2 dictionary results

big⋅mouth

[big-mouth]
–noun, plural -mouths [-mouthz, -mouths] for 1; (especially collectively) -mouth, (especially referring to two or more kinds or species) -mouths for 2.
1. a loud, talkative person, esp. one who lacks discretion.
2. any of several fishes having an unusually large mouth.

Origin:
1885–90, Americanism; big 1 + mouth
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Slang Dictionary
big mouth

  1. n.
    a person who talks too much or too loudly; someone who tells secrets. (Also a term of address.) : Okay, big mouth! Shut up!
  2. tv.
    to spread secrets around. : Why do you always have to big mouth everything around?
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw Hill.
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