What is cut a rug?

"Cut a rug" is an idiomatic expression in English that means to dance energetically or skillfully. The phrase is rooted in American slang from the early to mid-20th century, particularly associated with swing and jazz culture. Originally, it was thought to suggest that dancers were moving so vigorously on the dance floor that they might actually "cut" or wear out the rug beneath them. Over time, the phrase has become a fun and somewhat nostalgic way to refer to dancing, often evoking images of lively big band music and crowded dance halls.