"Bub" is a common nickname often used affectionately for friends, family members, or pets. It conveys a sense of familiarity and warmth, making it popular among various age groups. The name can be used for both males and females, although it is more frequently associated with boys or men. In some contexts, "Bub" can also refer to specific characters in popular culture, such as Bub the Zombie from the film Day of the Dead. Additionally, it may be used in regional dialects, particularly in the United States, to denote a close relationship or camaraderie.