Gerald Joseph "Jerry" Blavat (born July 3, 1940), also known as "The Geator with the Heater" and "The Big Boss with the Hot Sauce," is an American disc jockey and performer who has been a major influence in promoting oldies music on the radio. A Philadelphia icon, he gained local fame hosting live dances in the area, leading to his own independent radio show, on which he introduced many acts in the 1960s to a wide audience, including the Four Seasons and the Isley Brothers. Blavat was born in South Philadelphia to a Jewish father and Italian mother.