Simple Definition of head case
: a person who has mental or emotional problems : a crazy person
Full Definition of head case
: nut 6a
Examples of head case in a sentence
Her brother's a real head case.
<while serving in the military hospital's psychiatric unit, he got to observe a wide variety of head cases>
First Known Use of head case
Learn More about head case
Thesaurus: All synonyms and antonyms for "head case"
Seen and Heard
What made you want to look up head case? Please tell us where you read or heard it (including the quote, if possible).