In light of Gucci Mane’s desire to “handle” Eminem back in 2009, one has to wonder what a beef might have looked like. Throughout his career, Slim Shady has fielded no shortage of opponents. Cage, Everlast, Fred Durst, Canibus, Benzino, Ja Rule, Mariah Carey, and Machine Gun Kelly have all taken up arms against Em’s banner, only to be cast aside. Diss …