under glow 

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.

under glow by Lifted Dakota December 16, 2008

Green Glow Under My Car 

Having sex in your car.

I had the Green Glow Under My Car as i fucked her.

Green Glow Under My Car by conker5698 July 18, 2007

Underblown

1. Opposite of overblown. When you feel things are worse than what is stated.
2. A guy in serious need of a BJ

Guy 1: I think this covid thing is overblown.
Guy 2: Oh yeah, I think it’s underblown.
Guy 1: You’re underblown.

Underblown by An1ta Hummer June 23, 2021

hairy undergrowth 

When a female forgets or heaven forbids refuses to shave her pussy or ass crack and the pubes gain a foothold with terrifying results

Linda I don't want to upset you, but you should shave your hairy undergrowth, because I anit going down there till the lawn is mown,

hairy undergrowth by mitch00uk March 30, 2015

underglow 

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...

underglow by Hubs August 3, 2003

Underflow 

A simmering undercurrent of emotions not expressed during tumultuous relationships.

He could feel the underflow as his wife stared him down cold, is she finally done with the bullshit? Will he handle the 20 years of venom she’s about to unleash?

Underflow by Shirley Temple December 24, 2022

undergrowth 

1. The growth of small plants beneath the large trees of a forest

The hikers had to make a trail in the woods by cutting down the undergrowth

undergrowth by Alicant king October 24, 2017