n.
1.a dull stupid fatuous person
2.an abrupt spasmodic movement
3.(mechanics) the rate of change of velocity
4.a sudden abrupt pull jerk v.
1.pull, or move with a sudden movement
2.move with abrupt, seemingly uncontrolled motions
3.make an uncontrolled, short, jerky motion
4.jump vertically, with legs stiff and back arched
5.throw or toss with a quick motion