weirdo

noun2

1. •
   (informal, offensive) A strange, odd, eccentric person.
2. •
   (informal, offensive) An insane, possibly dangerous person.

adjective1

1. •
   Weird.

   • What's going on in this weirdo town? — 2004

noun1

1. •
   (slang) A superfan of American science-fiction author Andy Weir.