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
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