Rae Sremmurd

In a hip-hop landscape dominated by lo-fi mumble rappers and woozy Future-isms, Rae Sremmurd’s 2014 debut single, “No Flex Zone,” hit like the high beams of an 18-wheeler lighting up an interstate at night.

Atop a chiming Mike WiLL Made-It beat, the Tupelo-reared fraternal duo of Slim Jxmmi and Swae Lee let loose with an excitable, squealing flow that was as delightfully disorienting as their handle (a reverse spelling of EarDrummers, a.k.a.

the Mike WiLL Made-It imprint to which they signed).