wacko

(wakō)

adjective

Slang wacky

Origin: see -o

noun pl. wackos

Slang a person who is wacko

See wacko in American Heritage Dictionary 4

noun pl. wack·os also whack·os
Slang
A person regarded as eccentric or irrational: “a catchy pop portrait of a wacko who talks to himself in French” (Phoebe Hoban).
adjective
Wacky.

Origin:

Origin: Alteration of wacky

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