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paratonia

American  
[par-uh-toh nee-uh] / ˌpær ə toʊ ˈni ə /

noun

  1. Pathology. a type of hypertonia in which a person is unable to relax their muscles when part of their body is being moved by someone else.

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.