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1.
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."
by OCAU-Member April 23, 2004
 
2.
v. dioxided, dioxiding

1.To show off with no skill
2.To unsuccessfully perform a dangerous vehicle manouver in public
3.To boast about nonexistant driving skills
He dioxided and collided into the underground bondage bar;
John was dioxiding when his car was impounded;
Larry is such a dioxide.
by OCAU April 23, 2004