snake oil
noun🔊/ˈsneɪk ɔɪl/
🔊/ˈsneɪk ɔɪl/
[uncountable] (especially North American English, informal)something, for example medicine, that somebody tries to sell you, but that is not effective or useful 推销者的所谓 “万应灵药”；狗皮膏药（毫无用处或效果的推销品） a snake oil salesman 劣质品推销员