"highway robbery"의 정의 및 의미

What is the origin of the idiom "highway robbery" and when to use it?

The idiom "highway robbery" originated from the criminal activity of robbing travelers on the highways or roads, particularly during the 17th and 18th centuries. It is used to describe a situation where someone is charged an extremely high price for goods or services, especially when the cost is perceived as unfair or excessive.