jerk

A dull stupid fatuous person.

(mechanics) the rate of change of acceleration.

Raising a weight from shoulder height to above the head by straightening the arms.

A sudden abrupt pull.

Meat (especially beef) cut in strips and dried in the sun.

An abrupt spasmodic movement.

Throw or toss with a quick motion.

“jerk his head”

Pull, or move with a sudden movement.

“He turned the handle and jerked the door open”

Make an uncontrolled, short, jerky motion.

Jump vertically, with legs stiff and back arched.

Move with abrupt, seemingly uncontrolled motions.

“The patient's legs were jerkings”