The Collaborative International Dictionary of English v.0.48:

Euchre \Eu"chre\, n. [Perh. from F. ['e]cart['e].]
   A game at cards, that may be played by two, three, or four
   persons, the highest card (except when an extra card called
   the Joker is used) being the knave of the same suit as the
   trump, and called right bower, the lowest card used being the
   seven, or frequently, in two-handed euchre, the nine spot.
   See Bower.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Euchre \Eu"chre\, v. t.
   1. To defeat, in a game of euchre, the side that named the
      trump.
      [1913 Webster]

   2. To defeat or foil thoroughly in any scheme. [Slang.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

euchre
    n 1: a card game similar to ecarte; each player is dealt 5 cards
         and the player making trump must take 3 tricks to win a
         hand [syn: euchre, five hundred]

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "euchre":
   beat, beguile of, bilk, bunco, burn, cheat, chisel, chouse,
   chouse out of, cog, cog the dice, con, cozen, crib, defraud,
   diddle, do in, do out of, finagle, flam, fleece, flimflam, fob,
   fudge, gouge, gull, gyp, have, hocus, hocus-pocus, mulct,
   pack the deal, pigeon, practice fraud upon, rook, scam, screw,
   sell gold bricks, shave, shortchange, stack the cards, stick,
   sting, swindle, take a dive, thimblerig, throw a fight,
   victimize