Origin of snake oil
Examples from the Web for snake oil
Beware, too, of the snake-oil salesmen who promise permanently sharp knives.
Americans need protection from these snake-oil salesmen, and that protection depends almost entirely on Congress and the media.Leslie H. Gelb: The Dangers of Warmongering on Syria, Iran|Leslie H. Gelb|March 9, 2012|DAILY BEAST
This is a country,” says Joe Wilson, “that welcomes the Elmer Gantrys and the snake-oil salesman.
Such advisers are routinely dismissed by admission officers as snake-oil salesmen.
Idioms and Phrases with snake oil
see under banana oil.