Person who can't drive, but thinks he can. He often boasts about his incredible driving skills (to people on the Internet), then does something stupid like drifts his car into a telegraph pole (with all his mates in the car, no less).
"Man, that guy drives a shitbox and thinks it's the hottest thing on four wheels. He can't drive for shit, has numerous infringements, and thinks he's a champion drifter. He's such a Dioxide."