Can you define Southern rap? We mean beyond the obvious identifier of being made by rappers raised in the South. (Gee, thanks, professor!) Is there a telltale sign, an ingredient that makes a song undeniably from below the Mason-Dixon Line? Well, forget about drawled accents, thugged-out attitudes, or even a propensity to rap about barbecue. Miami's own Trick Daddy hit the gritty cultural nail on the head when he recreated the fat tubas and whoop-ass trombones of a Miami hard-stepping high school marching band, providing a unique low end for his "Shut Up" single. The result is irresistible, head-snapping funk that couldn't have come from anywhere else. For the tune's accompanying video, Trick even went one better: That's Northwestern High's own Marching Bulls strutting down the field. It's all about the Benjamins? Maybe in New York. Here in the Magic City, it's all about high school football, baby.