The term 'Bull Mate' is a reference to two characters from the classic cartoon series, 'Looney Tunes'. The two characters are Elmer Fudd and Elsie the Cow. Elmer Fudd is a hunter who is often seen chasing Bugs Bunny, while Elsie is a cow who is often seen with her calf, Bessie. Together, Elmer and Elsie form the Bull Mate duo, which is a humorous take on the classic hunter-prey relationship.