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View synonyms for

wacko

[ wak-oh ]

noun

plural wackos.
  1. Also an eccentric, strange, or odd person.

adjective

wacko

/ ˈæəʊ /

adjective

  1. mad or eccentric
“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

noun

  1. a mad or eccentric person
“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 History and Origins

Origin of wacko1

First recorded in 1970–75, Americanism; wacky, -o
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Word History and Origins

Origin of wacko1

C20: back formation from wacky

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