Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. Slang A person regarded as eccentric or irrational: "a catchy pop portrait of a wacko who talks to himself in French” ( Phoebe Hoban).
- adj. Wacky.
Wiktionary
- adj. amusingly eccentric or irrational
- n. An amusingly eccentric or irrational person.
- interj. UK, dated hurrah
WordNet 3.0
- n. a person who is regarded as eccentric or mad
Etymologies
- wack(y) + -o (Wiktionary)
- Alteration of wacky. (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“Looked at sufficiently askew (some might prefer the term wacko), everything is new under the sun.”
“Get real this wacko is here to stay, afterall he is a Republican and that in itself makes him royalty ... just ask him.”
“This dumb wacko is heading down the road to terrible change.”
“In 30 years this wacko is giong to look like Barbara Bush.”
“My big problem with you was and is the use of the word wacko and the tone of your earlier posts.”
“Hey Kj, I bet this freak of nature criminal lovin wacko-moonbat-rightwing person is blogging from the you know, the place for the criminally insane.”
“Yet I entertained myself with books, with tree knots which my brother and I called wacko whammos and my big yellow Tonka truck.”
“Beyond Governor Palin, remember that George W. Bush was characterized as a wacko fundamentalist even though he’s a Methodist—the same congregation to which Hillary Rodham Clinton belongs.”
“Now even though the nuts manifesto is on line no one can show a coherent argument that this wacko was a “right-winger” or a “Teabagger”.”
Think Progress » Scott Brown Yawns At Plane Attack On IRS Building: ‘No One Likes Paying Taxes’
“Call a spade a spade, er ... call a wacko a wacko!”
Lists
These user-created lists contain the word ‘wacko’.
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funny & derogatory
WARNING: VERY EXPLICIT. YOU HAVE BEEN WARNED.
funny derogatory names, quotes, phrases.
( open list, randomness, ad hom, ad hominem )
also see:
buttfucking quitter, dirty sanchez, donkey punch, falcon punch, assbadger, unicorn turd, assclown, fudgenut, quackery, friggin homo, buttmuncher, jackwagon and 292 more... -
Twitter favourites
The new favourite words of people on Twitter.
A script searches Twitter for "X is my new favourite word" and adds it to this list.
See also:
thunderfuck, incredible, merp, sara, flopparoo, smother, fugly, buer, plum, canny, nefelibata, cuntbucket and 2455 more... -
Time for a new list!
abrupt, erupt, rupture, sync, appropinquity, heterochromia, homochromatic, monochromatic, willy nilly, nitty gritty, kowtow, wonton and 455 more...
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conceptwriter's Words
sloth, jackass, dickhead, technostalgic, futuristic, enigma, impact, addict, nasty, premium, extraordinaire, yearning and 262 more...
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The "dark" things
grave, dead, death, die, died, dies, murder, murdered, murderer, murders, murdering, murderous and 115 more...
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List Rated 4
incarnate, tapering, archery, ponceau, crappie, vandalism, conger, acrid, exhort, gleed, sponger, torsion and 1 more...
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W is for Wellies
My W Words
woolworth, wonky, watusi, wordpunk, whistle punk, wretch, with bells on, walkie-talkie, wocka wocka, wench, wordsmith, wanderlust and 55 more...
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"Crazy" and its synonyms
crazy, mad, batty, bonkers, barmy, nuts, nutty, nutter, nutcase, insane, maniac, lunatic and 6 more...
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IM
i'm a/an
agnostic, passive agressive, brunette, kidult, myope, wacko, misanthrope, grim
Tweets
Looking for tweets for wacko.

bilby whassitsell? Dec 9, 2007
infostyx Also the name of the best store in Los Angeles. Dec 9, 2007