Guy "Master Gee" O'Brien is a founder of the hip hop group The Sugarhill Gang. On the band's signature song, "Rapper's Delight," he raps, "I said M-A-S, T-E-R, a G with a double E, I said I go by the unforgettable name of the man they call the Master Gee."
He left Sugar Hill Records in 1984. Since the group's departure from the label, Joey Robinson Jr., son of Sugar Hill producer Sylvia Robinson, has used the stage name Master Gee. O'Brien and Wonder Mike have been in court over the use of the name. The artists made a film, I Want My Name Back, about the appropriation of the group's name and the stage names.