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What does nutso mean?

Looking for the meaning or definition of the word nutso? Here's what it means.

Adjective
  1. (colloquial) Crazy, insane.
  2. (colloquial) Fraught or out of control.
  3. (colloquial) Obsessed; overly enthusiastic.
  4. (colloquial) Ridiculous; unbelievable or silly.
Noun
  1. (colloquial, countable) Crazy person; crackpot or lunatic.
  2. (colloquial, uncountable) Craziness; insanity.
Adverb
  1. (colloquial) Madly; extremely or obsessively.
  2. (colloquial) In a crazy manner.
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