nutball

• nut ball

From nut + -ball.

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nutball (plural nutballs)

1. (informal) A crazy person.
   • 1990 February 23, Glenn Garvin, “Postcards From a Lost War”, in Chicago Reader‎^[1]:

     Hull was much less of a nutball than most of them, and the CIA station chief started coming around more and more often.

   • 2008 March 22, Timothy Egan, “Donner Party Democrats”, in New York Times‎^[2]:

     One of their leaders had been hanging around the camp of another preacher man, the Rev. Jeremiah Wright Jr. — a nutball like Robertson, blaming America for bringing on the horrid attack.

• See also Thesaurus:mad person.

• bull ant