Reportedly from Spanish banca, a card game.
bunco (plural buncos)
- (US, slang) A swindle or confidence trick.
- A parlour game played in teams with three dice, originating in England but popular among suburban women in the United States at the beginning of the 21st century.
bunco (third-person singular simple present buncos, present participle buncoing, simple past and past participle buncoed)
- (transitive, intransitive, US, slang) To swindle (someone).
1910, Erwin Rosen, In the Legion, edition HTML, The Gutenberg Project, published 2012:
- They felt very sorry (so they said) for the poor old eleventh company having been buncoed into taking such an awful pack of useless recruits.