It was described to me by a friend from New Zealand as dancing on four wheels, as it was explained to me you need two cars running nearly side by side through a abbreviated road coarse basically sidways, you 'dance' next to your opponent and the one that runs closest to out of control and their opponent all the while 'looking good' wins. Probably simplified for my feabel mind and some on here probably won't admit to knowing more about this than me.
Still looks like a fun way to waste a perfictly good set of tires.
And yes, it is called a sport, but so is batmitton, golf, volleyball and 'gaming'.