Mac Miller feat. Diggy Simmons – “Definition Of Cool” [Audio] By Michael "Ice-Blue" Harris [@Iceblueva] - March 5, 2012 0 58 FacebookTwitterPinterestWhatsApp Pittsburgh’s Mac Miller and Diggy Simmons show you just how the new jacks get down with their new collabo “Definition Of Cool.” What do you think of this one hear? Weigh in and be heard as two of XXL Mag’s 2011 freshman class cause wreck.