What is the origin of the idiom "big shot" and when to use it?

The idiom "big shot" originated in American English around the early 20th century. It likely came from the expression "shot," meaning someone noteworthy or outstanding. "Big shot" emphasizes the significance or importance of the person being described. The idiom refers to a person who is considered important, influential, or powerful in a particular context. It implies that the individual holds a high-ranking position or has achieved notable success and recognition. While it often conveys a sense of importance or influence, it can also carry connotations of arrogance, self-importance, or a negative attitude towards someone perceived as being overly confident or boastful about their position or achievements.