Big timer is a common slang term used to describe an influential or important person. The word is often used to highlight the success, power, or wealth of an individual. However, there are several other words that can be used to convey the same meaning, such as "mover and shaker," "big shot," "heavyweight," and "top dog." These words can be used interchangeably with big timer to describe someone who is at the top of their game in their respective field. They are all commonly used in the business, entertainment, and political worlds to describe successful individuals who are influential and powerful.