Today, the term “snake oil” is used to describe something fake or disingenuous, but in the 19th century, it referred to actual oil from water snakes utilized in Chinese traditional medicine. The oil was seen as a cure-all with excellent anti-inflammatory properties. In the US, from the early 1900s, many brands began marketing placebos and bad substances as snake oil, which is how the oil became a symbol of all things bogus.