The Collaborative International Dictionary of English v.0.48:

Trickster \Trick"ster\, n.
   One who tricks; a deceiver; a tricker; a cheat.
   [1913 Webster]

WordNet (r) 3.0 (2006):

trickster
    n 1: someone who plays practical jokes on others [syn:
         prankster, cut-up, trickster, tricker, hoaxer,
         practical joker]
    2: someone who leads you to believe something that is not true
       [syn: deceiver, cheat, cheater, trickster,
       beguiler, slicker]
    3: a mischievous supernatural being found in the folklore of
       many primitive people; sometimes distinguished by prodigious
       biological drives and exaggerated bodily parts

Moby Thesaurus II by Grady Ward, 1.0:

33 Moby Thesaurus words for "trickster":
   Artful Dodger, Philadelphia lawyer, Yankee horse trader, charmer,
   cheat, cheater, con man, conjurer, crafty rascal, defrauder,
   diddler, dodger, double-dealer, escamoteur, flimflammer, fox,
   glib tongue, gyp artist, horse trader, illusionist, juggler,
   magician, prestidigitator, reynard, sharper, shyster,
   sleight-of-hand performer, slick citizen, sly dog, slyboots,
   sweet talker, swindler, tricker