IMO rice is adding non-functional, useless things
ex. -huge wing on a FWD car
-negative camber
-adding 100 lbs. in extras like body kit and huge stereo, then gutting the interior to try and compensate
-adding just an exhaust tip
-any stickers written in japanesse
and its not limited to what you do to your car, people can be rice in personality and the way they act
-- driving like a bat out of hell in busy traffic
- putting it in neutral at every red lights so you will roll backwards and make people think you drive a stick
These are just a few that I could come up with off the top of my head.
Worse than roadrage, carjackings and accidents..... they're ricers