sell someone a bill of goods
sell (one) a bill of goods
To convince someone of a lie, especially in order to take unfair advantage of them; to swindle or con someone. He said he would sell my bike and bring me back the profits, but he sold me a bill of goods—I never heard from him again! So you told me you would study harder if I got you that new video game, but your grades got even worse. Looks like you sold me a bill of goods!
sell someone a bill of goodsdeceive or swindle someone, usually by persuading them to accept something untrue or undesirable.
A bill of goods is a consignment of merchandise.
1968 Globe & Mail (Toronto) There was no production bonus…We were sold a bill of goods.