The Collaborative International Dictionary of English v.0.48:

Tricker \Trick"er\, n.
   One who tricks; a trickster.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tricker \Trick"er\, n.
   A trigger. [Obs. or Prov. Eng.] --Boyle.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tricker
    n 1: someone who plays practical jokes on others [syn:
         prankster, cut-up, trickster, tricker, hoaxer,
         practical joker]