Try Our Apps


Supposedly vs. Supposably


[krey-zee] /ˈkreɪ zi/
adjective, crazier, craziest.
mentally deranged; demented; insane.
senseless; impractical; totally unsound:
a crazy scheme.
Informal. intensely enthusiastic; passionately excited:
crazy about baseball.
Informal. very enamored or infatuated (usually followed by about):
He was crazy about her.
Informal. intensely anxious or eager; impatient:
I'm crazy to try those new skis.
Informal. unusual; bizarre; singular:
She always wears a crazy hat.
Slang. wonderful; excellent; perfect:
That's crazy, man, crazy.
likely to break or fall to pieces.
weak, infirm, or sickly.
having an unusual, unexpected, or random quality, behavior, result, pattern, etc.:
a crazy reel that spins in either direction.
noun, plural crazies.
Slang. an unpredictable, nonconforming person; oddball:
a house full of crazies who wear weird clothes and come in at all hours.
the crazies, Slang. a sense of extreme unease, nervousness, or panic; extreme jitters:
The crew was starting to get the crazies from being cooped up belowdecks for so long.
like crazy,
  1. Slang. with great enthusiasm or energy; to an extreme:
    We shopped like crazy and bought all our Christmas gifts in one afternoon.
  2. with great speed or recklessness:
    He drives like crazy once he's out on the highway.
Origin of crazy
1570-80; craze + -y1
Related forms
crazily, adverb
craziness, noun
half-crazy, adjective
1. crazed, lunatic. See mad. 2. foolish, imprudent, foolhardy. 8. rickety, shaky, tottering.
1. sane. 3. calm, dispassionate. 8. stable. 9. strong; healthy. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the Web for crazy
Contemporary Examples
Historical Examples
  • Nobody has seen a sign of her since morning, and Maria's pa's most crazy.

    By the Light of the Soul Mary E. Wilkins Freeman
  • He was acting like a crazy boy, and he was a man, all of twenty-two!

    K Mary Roberts Rinehart
  • Nobody would land upon the island to disturb them while that crazy dog was about.

    The Girls of Central High in Camp Gertrude W. Morrison
  • I don't think much of your Lauzanne, he's like a crazy horse.

    Thoroughbreds W. A. Fraser
  • The neighbors said she was crazy; but she, Letty, had liked that garden better than all the gardens she knew.

    The Dust Flower Basil King
British Dictionary definitions for crazy


adjective -zier, -ziest
(informal) insane
fantastic; strange; ridiculous: a crazy dream
(postpositive; foll by about or over) (informal) extremely fond (of)
(slang) very good or excellent
noun (pl) crazies
(informal) a crazy person
Derived Forms
crazily, adverb
craziness, noun
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
Cite This Source
Word Origin and History for crazy

1570s, "diseased, sickly," from craze + -y (2). Meaning "full of cracks or flaws" is from 1580s; that of "of unsound mind, or behaving as so" is from 1610s. Jazz slang sense "cool, exciting" attested by 1927. To drive (someone) crazy is attested by 1873. Phrase crazy like a fox recorded from 1935. Crazy Horse, Teton Lakhota (Siouan) war leader (d.1877) translates thašuka witko, literally "his horse is crazy."

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
Slang definitions & phrases for crazy



Excellent; splendid; cool: If you like a guy or gal, they're cool. If they are real fat, real crazy, naturally they're real cool (1940s+ Jazz musicians)


An insane or eccentric person; loony: We're going to prevent the right-wing crazies from bombing and destroying (1867+)

Related Terms

like crazy, stir-crazy

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
Cite This Source
Idioms and Phrases with crazy
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

Word of the Day

Difficulty index for crazy

Most English speakers likely know this word

Word Value for crazy

Scrabble Words With Friends

Nearby words for crazy