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grump

[gruhmp] /grʌmp/
noun
1.
a person given to constant complaining.
2.
Informal. the grumps, a depressed or sulky mood.
verb (used without object)
3.
to complain or sulk.
Origin
1835-1845
1835-45; probably back formation from grumpy
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for grumps

grump

/ɡrʌmp/
noun
1.
a surly or bad-tempered person
2.
(pl) a sulky or morose mood (esp in the phrase have the grumps)
verb
3.
(intransitive) to complain or grumble
Word Origin
C18: dialect grump surly remark, probably of imitative origin
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 grumps

grump

n.

"ill-humor," 1727, in humps and grumps "surly remarks," later the grumps "a fit of ill-humor" (1844), then "a person in ill humor" (1900); perhaps an extended sense of grum "morose, surly," which probably is related to Danish grum "cruel;" or perhaps suggested by grumble, grunt, etc.

Online Etymology Dictionary, © 2010 Douglas Harper
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11
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