Definition of "snake oil" in Anglais

Noun

1. 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. Any product with exaggerated marketing but questionable or unverifiable quality.