[n] a sudden muscle spasm; especially one caused by a nervous condition
[v] make an uncontrolled, short, jerky motion; "his face is twitching"
[v] move or pull with a sudden motion
[v] squeeze tightly between the fingers; "He pinched her behind"; "She squeezed the bottle"
[v] move with abrupt, seemingly uncontrolled motions; "The patient's legs were jerkings"
[v] toss with a sharp movement so as to cause to turn over in the air