Nutcase

Pronunciation: /ˈnʌtkəsɪ/

Nutcase (noun)

  1. A person considered mentally unstable or behaving in a very strange way.
  2. A person who acts in an extreme or illogical way, often causing problems for others.

Examples

  • That nutcase keeps changing plans every day.
  • The nutcase shouted at everyone in the hallway.