Source : Webster's Revised Unabridged Dictionary (1913)

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.