snake oil salesman
以欺诈手段推销伪劣产品的商人
口语·形容骗人的推销员
英文释义
someone who sells fake or fraudulent products or schemes, often making false claims about their effectiveness or benefits
例句
That guy is a snake oil salesman who sells fake health supplements.
典故来源
源自19世纪美国西部，小贩兜售号称能治百病的“蛇油”，实为假药，后指欺诈推销者。