St Vitus’s dance
noun /snt ˌvaɪtəsɪz ˈdɑːns/
/seɪnt ˌvaɪtəsɪz ˈdæns/
[uncountable] (old-fashioned)- Sydenham’s chorea (= a disease that mostly affects children, which causes the body to make small sudden movements and often follows rheumatic fever)