nuthead

noun5

1. •
   A silly or crazy person; kook.

   • “The people at the British Museum told us afterwards,” Einarsson recalled, “that they get so many letters every day from nutheads! They considered us nutheads!” — 2015
2. •
   A stupid person; fool; idiot.

   • Mum doesn't want a diamond ring out of a cracker, nuthead! — 1993
3. •
   Outer porition of a nut.

   • When you are striping gears and come to a nuthead run right over it, with fine lines on its edges, or around the nut, as may be preferred. — 1908
4. •
   A head made out of a nut.

   • Bend a paper clip into the shape of eyeglasses; glue them to the nuthead. — 2004
5. •
   Alternative form of nut-head.