A South African phrase for football (soccer), but generally relates to great pieces of skill in a game. Diski originates from the streets, as Diski is the local name for Football.
Johnny:"Geez, did you see Messi's goal against Madrid?"
Bob:"No, but I heard he flicked it through someones legs, then chipped it over the keeper".
Johnny:"Yea, he did!"
Bob:"Woah, that's Supa Diski!"