Bubba is a relationship nickname formed from brother, given to boys to indicate their role in the family, especially the oldest male sibling. For some boys and men, bubba is used so pervasively it replaces the given name. The nickname may also be used outside the family by friends as a term of affection.
Bubba (c. 1982 - August 22, 2006) was a Queensland grouper who resided at the Shedd Aquarium in Chicago, Illinois. Bubba is believed to be the first fish to undergo chemotherapy. He was often nicknamed "The Super Grouper."