folie
- n (psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness
- Carried away by a kind of folie deux, the boys resolve "to explore all the possibilities of human experience," to pluck the most exotic flowers of evil.
- French Critic Millau in an early observation of the trend labeled it la grande folie (the great folly).
- Paris finds itself swept up in a craze for chestnut-brown color that is being called "La folie du marron.