wacko
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wack·o
(wăk′ō) also whack·o (wăk′ō, hwăk′ō)Slangn. pl. wack·os
A person regarded as eccentric or irrational: "a catchy pop portrait of a wacko who talks to himself in French" (Phoebe Hoban).
adj.
Wacky.
[Alteration of wacky.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
wacko
(ˈwækəʊ)adj
mad or eccentric
n, pl wackos
a mad or eccentric person
[C20: back formation from wacky]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
wack•o
(ˈwæk oʊ)n., pl. wack•os,
adj. Slang. n.
1. Also, wack. an eccentric person.
adj. 2. wacky.
[1970–75, Amer.]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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| Noun | 1. |  wacko - a person who is regarded as eccentric or mad |
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Translations
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
Collins English/French Electronic Resource. © HarperCollins Publishers 2005
wacko
adj (inf) → durchgedreht (inf)
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007