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nincompoop

[nin-kuh m-poop, ning-] /ˈnɪn kəmˌpup, ˈnɪŋ-/
noun
1.
a fool or simpleton.
Origin
1670-1680
1670-80; origin uncertain
Related forms
nincompoopery, noun
nincompoopish, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for nincompoopery

nincompoop

/ˈnɪnkəmˌpuːp; ˈnɪŋ-/
noun
1.
a stupid person; fool; idiot
Word Origin
C17: of unknown 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 nincompoopery

nincompoop

n.

1670s, nicompoop. Despite similarity [noted by Johnson] to Latin legal phrase non compos mentis "insane, mentally incompetent" (c.1600), the connection is denied by etymologists because the earliest forms lack the second -n-. Weekley thinks first element may be a proper name, and cites Nicodemus, which he says was used in French for "a fool," or Nicholas. Klein says probably an invented word.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for nincompoopery

nincompoop

noun

A fool or stupid person (1676+)


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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