bun·co also bun·ko 
(bŭngkō) Informal
(bŭngkō) Informal n. pl. bun·cos also bun·kos
A swindle in which an unsuspecting person is cheated; a confidence game.
tr.v. bun·coed, bun·co·ing, bun·cos also bun·koed or bun·ko·ing or bun·kos
To swindle.
[Probably alteration of Spanish banca, card game, from Italian banca, bank, of Germanic origin; see BANK2.]