Jack the Bulldog
Jack the Bulldog is the official mascot of the Georgetown University Hoyas athletic teams. Jack has been the name of at least five live Bulldogs since 1962, when the name first came into use, though Georgetown counts seven official bulldog mascots including the two living ones. The current incarnation of Jack is an English Bulldog born in 2013 whose full name is John B. Carroll.
Mascot
Most American schools have a mascot. High schools, colleges, and even middle and elementary schools typically have mascots. Most of them have their mascot created as a costume, and use this costume at sports or social events. Examples of School mascots include UNC's Rameses the Ram, the University of Kansas' Big Jay and Baby Jay, University of Tennessee at Chattanooga's Scrappy the Mocking Bird, Western Michigan's Buster the Bronco, Temple's Hooter the Owl, Villanova's Will D. Cat the Wildcat, MIT's Tim the Beaver, Boston University's Rhett the Boston Terrier, and St. Joe's "The Hawk".