Nouns

(n)twitch, twitching, vellicationa sudden muscle spasm; especially one caused by a nervous condition

Verbs

(v)twitch, jerkmake an uncontrolled, short, jerky motion“his face is twitching”
(v)jerk, twitchmove with abrupt, seemingly uncontrolled motions“The patient's legs were jerking”
(v)flip, twitchtoss with a sharp movement so as to cause to turn over in the air
(v)pinch, squeeze, twinge, tweet, nip, twitchsqueeze tightly between the fingers“He pinched her behind”, “She squeezed the bottle”
(v)twitchmove or pull with a sudden motion