Definition of snake oil noun from the Oxford Advanced Learner's Dictionary


snake oil

BrE BrE//ˈsneɪk ɔɪl//
; NAmE NAmE//ˈsneɪk ɔɪl//
[uncountable] (informal, especially North American English)
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something, for example medicine, that somebody tries to sell you, but that is not effective or useful a snake-oil salesman
See the Oxford Advanced American Dictionary entry: snake oil