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bad-mouth

[bad-mouth or, sometimes, -mouth] /ˈbædˌmaʊθ or, sometimes, -ˌmaʊð/
verb (used with object), bad-mouthed, bad-mouthing.
1.
Slang. to speak critically and often disloyally of; disparage:
Why do you bad-mouth your family so much?
Also, badmouth.
Origin
1935-1940
1935-40; originally a curse, spell (the sense recorded in Gullah); compare Vai (Mande language of Liberia and Sierra Leone) dà nyà mà curse, literally, bad mouth
Related forms
bad-mouther, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for bad-mouth

bad-mouth

verb
1.
(transitive) (slang) to speak unfavourably about
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 bad-mouth
v.

"abuse someone verbally," 1941, probably ultimately from noun phrase bad mouth (1835), in Black English, "a curse, spell," translating an idiom found in African and West Indian languages. Related: Bad-mouthed; bad-mouthing.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for bad-mouth

bad-mouth

noun phrase

: If you can't say anything good, at least don't be a bad mouth

verb phrase

To disparage; denigrate: He bad-mouthed everybody (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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Difficulty index for bad-mouth

Few English speakers likely know this word

Word Value for bad

6
7
Scrabble Words With Friends

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