![Sly as a fox means to be as smart, clever and cunning as a fox but in a negative way. People who are sly as a fox trick and fool other people.](https://www.artisanenglish.jp/wp-content/uploads/2016/10/ArtisanEnglish.jp-sly-cunning-as-a-fox-e1565141039596.jpg)
English Cliché: Sly as a fox
Some people are so smart and clever that they can get anything they want. Most of the time, sly as a fox is used with a negative meaning to describe these people.
For example, there is a lot of telephone fraud these days targeting older people.
Quite often the perpetrator will call an older person, say something like, ‘Hey mom it’s me and I need some money.’
The perpetrator is as sly as a fox because many times they can trick the older person to send them a lot of money.