Ορισμός και Σημασία του "red cent"

What is the origin of the idiom "red cent" and when to use it?

The idiom "red cent" has its origin in the United States during the 19th century. It refers to the small copper coin known as the "cent," which used to have a reddish hue due to its copper content. This phrase is used to emphasize the idea that there is no money or an extremely small amount of money involved.