What is the origin of the idiom "put on airs" and when to use it?

The origin of the phrase "put on airs" is believed to date back to the 18th century. It stems from the idea of someone metaphorically putting on a show or performance to project an exaggerated sense of superiority. This idiom is used informally to criticize individuals who pretend to be more important or refined than they actually are, often by exaggerating their status or behavior. It is commonly used in discussions about people who act selfishly or show off, trying to impress others with a false image of themselves.