Definition of head case in US English:

head case

noun

British
informal
  • A mentally ill or unstable person.

    • ‘I refuse to change it because of one complete and utter headcase.’
    • ‘The strange thing is, after the exam incident, I turned into this lazy, scruffy headcase.’
    • ‘With the near-constant turmoil he's been through in two years at Minnesota - NCAA sanctions, a new coach, an academic mess - there are whispers that he could be a headcase.’
    • ‘I at least hope I have convinced you that my mom is a headcase and look forward to cathartically yet necessarily reviewing the insanity of my father next Saturday.’
    • ‘Of their surviving sons, Tilden is a taciturn headcase while Bradley is a sadistic brute who chopped off one of his legs with a chainsaw.’
    • ‘Stop being such an emotional headcase, she mentally scolded herself.’
    • ‘Let's keep this headcase and his howler-monkeys out of office for another term.’
    • ‘I like to think I'm polite. From my boxing, people think I'm a headcase, but I surprise people when they meet me.’
    • ‘You're gonna meet some headcases on this shift!’
    • ‘I refuse to accept that it can be statistically possible for the Conservative Party in the country to contain a higher percentage of headcases.’
    • ‘He was a headcase all dinner and he reeked of eau de scotch.’
    • ‘And, because the sets are still not used by a mass-market audience, you do look like a headcase in public places speaking, apparently, into nothingness.’
    • ‘‘She thought it was a joke, that I was some kind of headcase,’ Dwan says.’
    • ‘A quiet descended so deep and calm that I felt sure the person had left, gone to pound on some other headcase's front door, but then whoever-it-was knocked again.’
    • ‘‘This headcase barricades himself in a room with a set of drums, a $20 Casio keyboard, a guitar and a bass and emerges with the coolest, weirdest record of the past year.’’
    • ‘He has gone from thinking, ‘She's a headcase,’ to, ‘She seems like a complex, intriguing yet flawed human being, in whom I may still have an interest.’’
    • ‘The producers seem to take the most fragile of headcases from our TV slots and ram them into a house stuffed with other fragile headcases.’
    • ‘You can admit you like theatre and nobody thinks you're a headcase.’
    • ‘I would recommend this workout to anyone, married or single, because it makes you fit and makes you more lethal than the headcase who has his eye on you.’
    • ‘I wouldn't want to tangle with that other headcase.’
    madman, madwoman, maniac, lunatic
    View synonyms