Bunko \Bun"ko\, v. t. [imp. & p. p. Bunkoed; p. pr. & vb. n. Bunkoing.]

To swindle by a bunko game or scheme; to cheat or victimize in any similar way, as by a confidence game, passing a bad check, etc.

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: Webster's Revised Unabridged Dictionary (1913)