Best Rap Beefs & Hip-Hop Feuds Of all Time, Best Diss Tracks. Nothing says rap better than a good feud! Diss Tracks & Beefs… What’s beef? Is it when your mom ain’t safe up in the street? Or is it actually the fifth element of hip-hop? Dating all of the way back to when Big Bank Hank of the Sugar Hill Gang borrowed Grandmaster Caz’s rhyme book and used his lyrics without credit on “Rapper’s Delight,” MCs have been feuding on and off wax for years.