more commonly known as "Neon underbody kit" it is a series of 4+ neon tubes bolted to a cars frame to give the effect of a car gliding along on a glowing surface. If you want a good example, watch the Fast and The Furious a few times.
Fast and the Furious...
by Hubs August 03, 2003
2 more definitions
Neon or LED lights that stupid ricers put underneath thier cars. Illeagal in most states.
That rusty Honda has purple under glows on it, what a ricer.
by Lifted Dakota December 03, 2008
a very cool band from the Lincoln area. Go see them they rock good
Underglow they are ace
by dave the god October 03, 2003