People with FMD physically have the ability to control their bodies, but they’ve lost hold of the reins, resulting in involuntary, abnormal behaviours. 2021 September 1, Grace Browne, “They saw a YouTube video. Then they got Tourette’s”, in Wired UK, →ISSN, archived from the original on 04 Sep 2021:
(abbreviation, alt-of, initialism, uncountable) Initialism of foot-and-mouth disease.