I don't know, but this has ****-all to do with Gran Turismo 3. I know that. And I know that you should know better. You do have a fetus in your avatar.
To answer the mildly stupid question at hand, yes I think it's possible to drift a unicycle. You must first master the art of drifting the Toyota Corolla, though. I'd use sim tires with a camber setting of -45. Keep everything else stock.
Where is boombexus with his little dustpan and skirt?