Source : Webster's Revised Unabridged Dictionary (1913)

Bunko \Bun"ko\, n. [Sf. Sp. banco bank, banca a sort of game at
   cards. Cf. {Bank} (in the commercial sense).]
   A kind of swindling game or scheme, by means of cards or by a
   sham lottery. [Written also {bunco}.]

   {Bunko steerer}, a person employed as a decoy in bunko.
      [Slang, U.S.]

Source : WordNet®

bunco
     n : a swindle in which you cheat at gambling or persuade a
         person to buy worthless property [syn: {bunco game}, {bunko},
          {bunko game}, {con}, {confidence trick}, {confidence
         game}, {con game}, {gyp}, {hustle}, {sting}, {flimflam}]
     v : deprive of by deceit; "He swindled me out of my
         inheritance"; "She defrauded the customers who trusted
         her"; "the cashier gypped me when he gave me too little
         change" [syn: {victimize}, {swindle}, {rook}, {goldbrick},
          {nobble}, {diddle}, {defraud}, {scam}, {mulct}, {gyp}, {con}]