Synonym: daft, insane, lunatic, mad, unbalanced. Antonym: sane. Similar words: craze, frazzle, frazzled, cramp, crawl, crack, craft, crash. Meaning: ['kreɪzɪ] 
n. someone deranged and possibly dangerous. adj. 1. affected with madness or insanity 2. foolish; totally unsound 3. marked by foolish or unreasoning fondness 4. possessed by inordinate excitement 5. bizarre or fantastic 6. intensely enthusiastic about or preoccupied with.
n. someone deranged and possibly dangerous. adj. 1. affected with madness or insanity 2. foolish; totally unsound 3. marked by foolish or unreasoning fondness 4. possessed by inordinate excitement 5. bizarre or fantastic 6. intensely enthusiastic about or preoccupied with. 
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61, That guy is acting crazy.
62, It'd be crazy to go out in this rain.
63, I must have been crazy to agree to this.
64, I want no part in/of your crazy schemes!
65, The group's performance always drives the audience crazy.
66, He went crazy and tried to kill her.
67, We were crazy with excitement.
68, What started him off on this crazy idea?
69, Rick is crazy about football.
70, All the publicity nearly sent him crazy.
71, The kids went crazy when the film star appeared.
72, Your mother is driving me crazy.
73, Lorna is completely crazy about her boyfriend.
74, You're so beautiful you're driving me crazy.
75, The whole idea sounds plumb crazy to me.
76, The stuff was selling like crazy.
77, She didn't dig that crazy staff.
78, 'I must be crazy(sentencedict.com),[sentencedict.com]' she thought.
79, His sister screamed out that he was crazy.
80, I don't dig that crazy stuff.
81, He is crazy about that girl.
82, He has gone crazy from drink.
83, When Jock woke up and found you gone he went crazy.
84, He is so crazy about U.F.O.that he laps up all he can read about it.
85, I can't imagine lying like that. I would go crazy.
86, So there we were with Amy and she was driving us crazy.
87, He's still crazy about both his work and his hobbies.
88, He strides around the room beaming like a crazy man.
89, We worked like crazy to get it done on time.
90, I know this sounds a crazy thing for me to ask you.
More similar words: craze, frazzle, frazzled, cramp, crawl, crack, craft, crash, crayon, scrawl, craggy, crabby, craving, cranium, scratch, crackdown, scrabble, Democrat, aircraft, scramble, crawling, scrawled, democracy, lucrative, unscramble, witchcraft, democratic, autocratic, aristocrat, bureaucracy.