Source : Webster's Revised Unabridged Dictionary (1913)

Twitch \Twitch\, v. t. [imp. & p. p. {Twitched}; p. pr. & vb. n.
   {Twitching}.] [OE. twicchen, fr. (doubtful) AS. twiccian;
   akin to AS. angeltwicca a worm used for bait, literally, a
   hook twitcher, LG. twikken to tweak, G. zwicken. Cf.
   {Tweak}.]
   To pull with a sudden jerk; to pluck with a short, quick
   motion; to snatch; as, to twitch one by the sleeve; to twitch
   a thing out of another's hand; to twitch off clusters of
   grapes.

         Thrice they twitched the diamond in her ear. --Pope.