Meaning of the word nutcase in English

What does nutcase mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

nutcase

US /ˈnʌt.keɪs/
UK /ˈnʌt.keɪs/

Noun

someone who behaves in an extremely silly way:

Example:
Only complete nutcases like myself swim in the ocean in winter.