Definition of "wacko" []

• Slang A person regarded as eccentric or irrational: "a catchy pop portrait of a wacko who talks to himself in French” ( Phoebe Hoban). (noun)
• Wacky. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "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."