snake oil

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium. Particularly: “Some sources derive it from Seneca oil rather than from snake.”)

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snake oil (uncountable)

1. (idiomatic) A fraudulent, ineffective potion or nostrum; panacea.
2. A traditional Chinese medicine used to treat joint pain.
3. A type of 19th-century patent medicine sold in the United States that claimed to contain snake fat, supposedly a Native American remedy for various ailments.
4. (idiomatic) Any product with exaggerated marketing but questionable or unverifiable quality.
   • 2022 January 12, Nigel Harris, “Comment: Unhappy start to 2022”, in RAIL, number 948, page 3:

     As for the IRP, Secretary of State Grant Shapps continues to peddle snake oil, smoke and mirrors. His reaction to near-universal IRP condemnation from politicians, local and national media, and all but a few rail specialists was to dismiss the lot of us (in the condescending and patronising tone we have now come to expect) as "critics and naysayers".

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