Akademik

nut case
noun
a whimsically eccentric person
Syn: ↑crackpot, ↑crank, ↑nut, ↑fruitcake, ↑screwball
Derivationally related forms: ↑screwball (for: ↑screwball)
Hypernyms: ↑eccentric, ↑eccentric person, ↑flake, ↑oddball, ↑geek

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noun
: a foolish, eccentric, or crazy person

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Slang (offensive).
a deranged person; lunatic.
[1955-60]

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nut|case or nut case «NUHT kays», noun,
Informal. a wildly eccentric or insane person.

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(also nutcase) n. informal a crazy or foolish person

Useful english dictionary. 2012.