jactitate
To move about restlessly.
intransitive, rare
The ass is lying on its side, ribs heaving, forelegs jactitating.
Where it comes from
First attested in 1822; borrowed from Latin iactitātus, perfect passive participle of iactitō, see -ate (verb-forming suffix).
Adapted from the Wiktionary entry jactitate (CC BY-SA 4.0).