Someone who listens to electronic dance music while in a sitting position. It generally refers to people who listen to electronic dance music outside of the party environment and in their daily lives, i.e. at home, in the car, on the mp3 player, at work, etc.
Once you hear a lot of good techno at parties while you're rolling, you just wanna listen to it all the time. First it starts in the car when no one's listening. Later it ends up in your iPod and you're jammin all day. You've become a chair raver