noun (plural folies à deux /fôˌlēz/)
Delusion or mental illness shared by two people in close association.
- They each reinforce each others insanity - in psychology this is called a folie à deux or a shared madness.
- As noted above, we could uncover no causative or precipitating emotional or other factors for this folie à deux dissociative disorder.
- Addicts of flaming folies à deux will be pleased to learn that this season is providing a promisingly thorny set of variations on the theme of really tough love.
Early 20th century: French, literally 'shared madness'.
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