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