crazy

[krey-zee]
adjective, crazier, craziest.
1.
mentally deranged; demented; insane.
2.
senseless; impractical; totally unsound: a crazy scheme.
3.
Informal. intensely enthusiastic; passionately excited: crazy about baseball.
4.
Informal. very enamored or infatuated (usually followed by about ): He was crazy about her.
5.
Informal. intensely anxious or eager; impatient: I'm crazy to try those new skis.
6.
Informal. unusual; bizarre; singular: She always wears a crazy hat.
7.
Slang. wonderful; excellent; perfect: That's crazy, man, crazy.
8.
likely to break or fall to pieces.
9.
weak, infirm, or sickly.
10.
having an unusual, unexpected, or random quality, behavior, result, pattern, etc.: a crazy reel that spins in either direction.
noun, plural crazies.
11.
Slang. an unpredictable, nonconforming person; oddball: a house full of crazies who wear weird clothes and come in at all hours.
12.
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.
Idioms
13.
like crazy,
a.
Slang. with great enthusiasm or energy; to an extreme: We shopped like crazy and bought all our Christmas gifts in one afternoon.
b.
with great speed or recklessness: He drives like crazy once he's out on the highway.

Origin:
1570–80; craze + -y1

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.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
crazy (ˈkreɪzɪ)
 
adj , -zier, -ziest
1.  informal insane
2.  fantastic; strange; ridiculous: a crazy dream
3.  informal (postpositive; foll by about or over) extremely fond (of)
4.  slang very good or excellent
 
n , -zier, -ziest, crazies
5.  informal a crazy person
 
'crazily
 
adv
 
'craziness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

crazy
1570s, "diseased, sickly, from craze; 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 thauka witko, lit. "his horse is crazy."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Idioms & Phrases

crazy

In addition to the idioms beginning with crazy, also see drive someone crazy; like crazy.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
He almost became crazy, thinking he was going to faint and would not be able to
  walk.
Movies, it's still crazy, but it's an acceptable amount of crazy.
When he told them what he was doing, the matriarch declared him crazy.
Four were loaded on the donkey's back, secured in a crazy jumble by a tangle of
  plastic twine and bungee cords.
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