The term 'Flag Tosser' is a job title for a referee, or REF. A referee is responsible for officiating a sporting event, such as a football game. They are responsible for making sure the rules of the game are followed and that the players are playing fairly. The referee also has the authority to issue penalties and eject players from the game if necessary. Flag tossing is one of the most recognizable duties of a referee, as they throw a yellow flag onto the field when a penalty has been committed.