wacky
Americanadjective
adjective
Other Word Forms
Etymology
Origin of wacky
First recorded in 1935–40; apparently whack (noun, as in out of whack ) + -y 1
Explanation
Something that's wacky is weird or nutty or silly. Your goofy uncle who wears a funny hat and does magic tricks at the dinner table is wacky. Use the adjective wacky when you're talking about someone with a ridiculous sense of humor. Clowns are, by definition, wacky, for example. Most people have at least one wacky relative, and some are lucky enough to have entire wacky families. Wacky comes from the nineteenth century British slang term whacky, which arose from whack, specifically the idea of getting whacked on the head so hard that it turns you wacky.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Wacky character traits get trotted out merely for visual dazzle, not to generate any intrigue.
From The Wall Street Journal • Mar. 31, 2026
This would lead to the creation of the Wacky Soap Box Racers, in which the makeshift cars would careen through painted facades of cartoon-ish animals cheering on the guests.
From Los Angeles Times • Dec. 22, 2025
Dick Dastardly was a character in 1960s animated TV series Wacky Races - and several other cartoons and films since - who would try to win by utilising underhand tactics.
From BBC • Oct. 30, 2024
“What are the words they use? Wacky, kooky, crystal lady,” she said, listing the names she’s called.
From Seattle Times • Nov. 12, 2023
There were also a felt pennant from Disneyland and a rubber-banded stack of cartoony cards for something called Wacky Packages.
From "Escape from Mr. Lemoncello's Library" by Chris Grabenstein
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
