yerk /ˈjɝk/
  Yerk v. t. [imp. & p. p. Yerked p. pr. & vb. n. Yerking.]
  1. To throw or thrust with a sudden, smart movement; to kick or strike suddenly; to jerk.
  Their wounded steeds . . .
  Yerk out their armed heels at their dead masters.   --Shak.
  2. To strike or lash with a whip.  [Obs. or Scot.]
  Yerk, v. i.
  1. To throw out the heels; to kick; to jerk.
     They flirt, they yerk, they backward . . . fling.   --Drayton.
  2. To move a quick, jerking motion.
  Yerk, n. A sudden or quick thrust or motion; a jerk.
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