Today, rappers like Ski Mask the Slump God, Sheck Wes, and 6ix9ine are known for their boisterous flows. Hip-hop has always been loud, however, and yelling has been an outlet for MCs to express their emotions on wax since its early days. Run-D.M.C. and Beastie Boys took the style to another level, setting the table for artists like Public Enemy, LL Cool J, and N.W.A.