snake oil

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A popular term for any substance claimed—without substantive evidence—to effectively treat one or more medical conditions

snake oil

A general informal term for a fraudulent PANACEA.
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References in periodicals archive ?
He had a "bad eye", I said (never trust a human or any animal with a mean eye) and I considered him to be a snake oil salesman.
Make no bones about it, this was the Italian football authorities, courts and police picking out the equivalent of Manchester United - and not resting for a second until every single snake oil salesman at Old Trafford was outed, prosecuted and banished from the viper's nest from whence they emerged.
Don't get taken in by snake oil salesman, even if they're using 21st century tactics to hawk their wares.
They will be able to see through Howard for the snake oil salesman he is.