crazy

[ krey-zee ]

adjective

, cra·zi·er, cra·zi·est.

1. mentally deranged; demented; insane.

   Synonyms: lunatic, crazed

   Antonyms: sane

2. Informal. unpredictable, nonconforming, or odd:

   All I can say is she's the craziest person I know.

3. Informal. unusual; bizarre; singular:

   She always wears a crazy hat.

4. Informal. senseless; nonsensical; totally unsound:

   Surely you don’t plan to invest money in that crazy scheme!

   Synonyms: foolhardy, imprudent, foolish

5. Informal. extremely busy, hectic, chaotic, etc.:

   Yesterday was such a crazy day I hardly had time to eat.

6. Informal. intensely enthusiastic; passionately excited (usually followed by about or for ):

   Like many kids, he was crazy for baseball and yearned to be a professional ballplayer.

   Antonyms: dispassionate, cool

7. Informal. very enamored or infatuated (usually followed by about or for ):

   It's obvious he's just crazy about her.

8. Informal. intensely anxious or eager; impatient:

   I'm crazy to try those new skis.

9. Informal. very annoyed, frustrated, or bothered:

   It makes me crazy that some kids don't get a fair chance in life.

10. Informal. having an unusual, unexpected, or random quality, behavior, result, pattern, etc.:

    I'm back in Connecticut in a crazy twist of events, living in the same town where I grew up.

11. Slang. wonderful; excellent; perfect:

    That's crazy, man, crazy.

12. Archaic. likely to break or fall to pieces.

    Synonyms: passionate, impassioned, ardent

    Antonyms: stable

13. Archaic. weak, infirm, or sickly.

    Antonyms: healthy, strong

adverb

1. Informal. extremely; madly:

   December is a crazy busy month for us.

   That new clothing store is crazy popular with teenage girls.

noun

, plural cra·zies.

1. a person who is mentally deranged or insane.
2. Informal. an unpredictable, nonconforming person; oddball:

   Next door is a house full of crazies who wear weird clothes and come in at all hours.

3. the crazies, Informal. 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.

crazy

/ ˈkreɪzɪ /

adjective

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

noun

1. informal.
   a crazy person

Derived Forms

• ˈcrazily, adverb
• ˈcraziness, noun

Other Words From

• cra·zi·ly adverb
• cra·zi·ness noun
• half-cra·zy adjective

Word History and Origins

Origin of crazy¹

First recorded in 1570–80; craz(e) + -y ¹

Idioms and Phrases

Idioms

1. like crazy, Informal.
   1. 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.

More idioms and phrases containing crazy

• drive someone crazy
• like crazy

Synonym Study

See mad.

Example Sentences

Jones earned rave reviews in his early England days, with captain Jamie George lauding the "crazy energy" he was coaxing from their defence.

From BBC

“This kind of sounds crazy to say, but I feel this about myself — my life has gotten smaller over time,” he says, even as Danson points out how much he’s balancing professionally.

From Los Angeles Times

It says shoppers can expect "crazy low prices" on Haul products that are "worth the wait" of up to two weeks for delivery.

From BBC

I knew it was a crazy idea, but an exciting idea.

From BBC

How quickly did it go from a crazy idea to reality?

From BBC

Related Words

• absurd
• bizarre
• foolish
• goofy
• insane
• irresponsible
• ludicrous
• odd
• outrageous
• preposterous
• ridiculous
• silly
• strange
• weird