Assuming you understand what swag is, then swag king seems somewhat obvious. However, it is nearly impossible to achieve. Artists like Soulja Boy have attempted to rap about swag to the point of obliteration in hopes of achieving Swag King status. Nonetheless, no one to this date has achieved such a prestigious ranking. To be a swag king, one must first simply walk into Mordor. The world still awaits its Swag King...

(noun) A successful type of theft which results in an acceptable, impressive and rewarding payday for the protagonist.