The Collaborative International Dictionary of English v.0.48:

Twig \Twig\ (tw[i^]g), v. t. [imp. & p. p. Twigged (tw[i^]gd);
   p. pr. & vb. n. Twigging.] [Cf. Tweak.]
   To twitch; to pull; to tweak. [Obs. or Scot.]
   [1913 Webster]