wacko

[wak-oh]Slang.

See more synonyms for wacko on Thesaurus.com

noun, plural wack·os.

Also wack. an eccentric, strange, or odd person.

adjective

wacky.

Origin of wacko

1970–75, Americanism; see wacky, -o

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for wacko

screwball, crackpot, lunatic, nut, crazy, flake, dingbat, crank, weirdo, fruitcake, wacko, kook, oddball, maniac, fool, eccentric, madman, loony, madwoman, lamebrain

Examples from the Web for wacko

Contemporary Examples of wacko

At first this plays like some sort of bizarre SNL sketch: the wacko physician.
Why Is Louis C.K. So Funny? He Uses Humor as a Moral Compass.
Andrew Romano
May 2, 2014
McCain called Cruz a “wacko bird” and later took it back, about as insincerely as possible.
Why the GOP Needs a Return to the Bush Leagues
Robert Shrum
April 21, 2014
The hysteria and hostage taking of Wacko Bird Inc. is not reasonably matched to the current situation.
Heckuva Job, Wacko Birds: You’ve Shut Down the U.S. Government
Kirsten Powers
October 1, 2013
The GOP “suicide caucus”, led by proud “wacko bird” Sen. Ted Cruz, was, not surprisingly, spawned from a faulty premise.
Heckuva Job, Wacko Birds: You’ve Shut Down the U.S. Government
Kirsten Powers
October 1, 2013
In a country where six of 10 voters already think the government is too big, the wacko bird caucus has got a lot of room to fly.
Ted Cruz Might Just Have Won the Future for the GOP
Nick Gillespie
September 25, 2013

British Dictionary definitions for wacko

wacko

adjective

mad or eccentric

noun plural wackos

a mad or eccentric person

Word Origin for wacko

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

Word Origin and History for wacko

extended form of wack, recorded from 1977.