What is the meaning of jerking?

noun

• An abrupt spasmodic movement.
  • synonyms: jerk, jolt, saccade

verb

• Pull, or move with a sudden movement.
  • usage: "He turned the handle and jerked the door open"
  • synonyms: yank, jerk
• Move with abrupt, seemingly uncontrolled motions.
  • usage: "The patient's legs were jerkings"
  • synonyms: jerk, twitch
• Make an uncontrolled, short, jerky motion.
  • usage: "his face is twitching"
  • synonyms: twitch, jerk
• Jump vertically, with legs stiff and back arched.
  • usage: "the yung filly bucked"
  • synonyms: buck, jerk, hitch
• Throw or toss with a quick motion.
  • usage: "flick a piece of paper across the table"; "jerk his head"
  • synonyms: jerk, flick

adjective

• Lacking a steady rhythm.
  • usage: "an arrhythmic heartbeat"
  • synonyms: arrhythmic, jerky