twitch >> twɪtʃ
Definition: [verb] give or cause to give a short, sudden jerking or convulsive movement.
Example: her lips twitched and her eyelids fluttered
Definition: [verb] use a twitch to subdue (a horse).
Definition: [noun] a short, sudden jerking or convulsive movement.
Example: his mouth gave a slight twitch
Definition: [noun] a small noose attached to a stick, which may be twisted around the upper lip or the ear of a horse to subdue it during veterinary procedures.