The Collaborative International Dictionary of English v.0.48:

Fan-tan \Fan"-tan`\ (f[a^]n"t[a^]n`), n. [Chinese (of Canton) in
   an-tan-kun gambling house.]
   1. A Chinese gambling game in which coins or other small
      objects are placed upon a table, usually under a cup, and
      the players bet as to what remainder will be left when the
      sum of the counters is divided by four.
      [Webster 1913 Suppl.]

   2. A game with playing cards in which the cards are played in
      sequences upon the table, the one who first gets rid of
      his cards being the winner.
      [Webster 1913 Suppl.]