The Collaborative International Dictionary of English v.0.48:

Twister \Twist"er\, n.
   1. One who twists; specifically, the person whose occupation
      is to twist or join the threads of one warp to those of
      another, in weaving.
      [1913 Webster]

   2. The instrument used in twisting, or making twists.
      [1913 Webster]

            He, twirling his twister, makes a twist of the
            twine.                                --Wallis.
      [1913 Webster]

   3. (Carp.) A girder. --Craig.
      [1913 Webster]

   4. (Man.) The inner part of the thigh, the proper place to
      rest upon when on horseback. --Craig.
      [1913 Webster]
      [1913 Webster]

WordNet (r) 3.0 (2006):

twister
    n 1: a localized and violently destructive windstorm occurring
         over land characterized by a funnel-shaped cloud extending
         toward the ground [syn: tornado, twister]
    2: small friedcake formed into twisted strips and fried; richer
       than doughnuts [syn: cruller, twister]

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "twister":
   apple fritter, baguio, beignet, beignet aux pommes, bismarck,
   cheat, con man, confidence man, crook, cruller, cyclone, deceiver,
   doughnut, dust devil, fastnacht, fraud, friedcake, fritter,
   hurricane, imposter, impostor, mountebank, olykoek, rainspout,
   raised doughnut, rogue, rotary storm, sand column, sandspout,
   scoundrel, sinker, swindler, tornado, trickster, typhoon,
   waterspout, whirlblast, whirlwind, wind eddy