Definition, Meaning & Synonyms

headcase

Noun
/ˈhɛd.keɪs/
Definition
A person who is considered mentally unbalanced or eccentric.
Examples
  • “He’s a real headcase; you never know what he’s going to do next.”
  • “Don’t mind her; she’s just a bit of a headcase sometimes!”
  • “The protagonist in the novel is a brilliant but troubled headcase.”
Meaning
The term is often used informally to describe someone whose mental stability is questionable or who has unusual or unpredictable behavior.
Synonyms
  • Crazy
  • Nutcase
  • Looney
  • Fruitcake
  • Weirdo