Definition of "nut"
nut1
/nʌt/
noun
plural nuts
(colloquial) An extreme enthusiast.
(UK, slang, dated) An extravagantly fashionable young man.
verb
third-person singular simple present nuts, present participle nutting, simple past and past participle nutted or (nonstandard) nut
(slang) To defeat thoroughly.
nut3
/nʌt/
interjection
(Scotland, colloquial) No.