Definitions from Wiktionary (nutso)

▸ adjective:  (colloquial) Crazy, insane.
▸ adjective:  (colloquial) Fraught or out of control.
▸ adjective:  (colloquial) Obsessed; overly enthusiastic.
▸ adjective:  (colloquial) Ridiculous; unbelievable or silly.
▸ noun:  (colloquial, countable) A crazy person; a crackpot or lunatic.
▸ noun:  (colloquial, uncountable) Craziness; insanity.
▸ adverb:  (colloquial) Madly; extremely or obsessively.
▸ adverb:  (colloquial) In a crazy manner.

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