crank - definition and synonyms

noun [countable] 

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  1. 1
    British informal someone with ideas or behaviour that you think are very strange
     Synonyms and related words
    1. a.
      [only before noun] used about someone’s behaviour or actions

      Radio stations often get crank calls.

  2. 2
    a piece of equipment that turns to make something move or start
  3. 3
    American informal someone who gets angry easily and is unpleasant to other people