wacko

[ wak-oh ]
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noun,plural wack·os.
  1. Also wack. an eccentric, strange, or odd person.

adjective

Origin of wacko

1
First recorded in 1970–75, Americanism;see wacky, -o
  • Also whack·o [hwak-oh, wak-oh] /ˈʰwæk oʊ, ˈwæk oʊ/ .

Words Nearby wacko

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How to use wacko in a sentence

British Dictionary definitions for wacko

wacko

/ (ˈwækəʊ) informal /


adjective
  1. mad or eccentric

nounplural wackos
  1. a mad or eccentric person

Origin of wacko

1
C20: back formation from wacky

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