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nuts

 
/nʌts/ adj [not gradable] infml

Definition

crazy, foolish, or strange: You’re nuts if you think you can go mountain climbing in a snowstorm. If you are nuts about or nuts over someone or something, you are very enthusiastic about that person or thing: He’s nuts about his new granddaughter.
(Definition of nuts adj from the Cambridge Academic Content Dictionary © Cambridge University Press)

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