What is "jactation"

Jactation \Jac*ta"tion\ (j[a^]k*t[=a]"sh[u^]n), n. [L. jactatio, fr. jactare: af. F. jactation. See Jactancy.] A throwing or tossing of the body; a shaking or agitation.
--Sir. W. Temple.

n. 1 A tossing or shaking of the body; physical agitation, especially while asleep or confined to bed by ilness; jactitation. 2 The action of throwing. 3 boasting; bragging; showing off.

n. (pathology) extremely restless tossing and twitching usually by a person with a severe illness [syn: jactitation]