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A person regarded as strange, eccentric, or crazy.
[Possibly from cuckoo.]
informal US and Canadian an eccentric, crazy, or foolish person
[C20: probably from cuckoo]
an eccentric, strange, or crazy person.
[1920–25; perhaps alter. of cuckoo]
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|Noun||1.||kook - someone regarded as eccentric or crazy and standing out from a group|