A phrase used predominately in the South (its emergence being through Southern Rap) which was created for drug dealers/hustlers in the South. The phrase depicts the success of any hustler/dope boy/drug dealer because of the skills they have. Any kind of amazing success, brought about being a Dope Boy, can be referred to as: "Dope Boy Magic".
Jay: "How da fuck did you sell all dat bud in one hour?!?"
Joc: "I call it Dope Boy Magic..."