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

And I think that has allowed us to really take care of each other on this crazy, wonderful ride that we’re on.

From Los Angeles Times

“It was a crazy couple months in my life,” she recalls.

From Los Angeles Times

“It’s just gone completely crazy,” says Mike Young, a science communicator in Denmark who gives social media workshops to scientists.

From Science Magazine

“It was the craziest time of my life.”

From Los Angeles Times

"It just goes crazy - you could probably hear it in the UK - the sound of 90,000 people cheering and going crazy."

From BBC

Related Words

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