“I wonder how the word nut came to refer to people like me.”
The Oxford English Dictionary has the answer:
7. colloq. (orig. U.S.).Related reading
a. A mad or crazy person; an eccentric, a crank.
1908 H. C. FISHER in San Francisco Examiner 23 Nov. 6 (comic strip) They’ll just think I’m some old nut.
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