nut

noun [C] (PERSON)

/nʌt/ infml

Definition

› a person who is crazy, foolish, or strange: What kind of nut would leave a computer in his car overnight with the doors unlocked? › A nut is also a person who is extremely enthusiastic about a particular activity or thing: Joyce is a nut for antiques – we’ve got a house full of them.

(Definition of nut noun (PERSON) from the Cambridge Academic Content Dictionary © Cambridge University Press)

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the nuts and bolts of something idiom

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