The term 'MOB FAMILY HEAD' is a job description for a DON, which is a three letter word. A DON is the leader of a Mafia family, also known as a crime syndicate. The DON is responsible for making decisions and managing the operations of the family. They are also responsible for ensuring that the family follows the rules and regulations set by the Mafia. The DON is usually the most powerful and influential member of the family and is respected by all members.