Throw or toss with a quick motion

• An abrupt spasmodic movement
• Move with abrupt, seemingly uncontrolled motions
• Jump vertically, with legs stiff and back arched, as of horses
• Suddenly tugging
• Pull, or move with a sudden movement

Wiktionary Word definitions in Wiktionary
n. A motion that jerks; a jerk. vb. (present participle of jerk English)

Wikipedia Word definitions in Wikipedia
Jerking may refer to: Jerkin' , a dance Jerking off, masturbation

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Jerking \Jerk"ing\, n. The act of pulling, pushing, or throwing, with a jerk. -- Jerk"ing*ly , adv.