Someone who is environmentally conscious, especially in regard to global warming. However, drives a truck or car that belches black smoke. Usally owns sleds, quads, dirt bikes etc.
Zack keeps talking about saving the polar bears but drives that lifted dodge 1 ton that smokes more then a chines factory. Definitely a diesel hippie.
by Trash Panda101 October 21, 2018

He was built like a freight train, and probably had the diesel power to match, too...or, so I saw from her face the next morning.
by Stupidly Sophisticated August 2, 2021

Ryan was looking for his one and only diesel dood.
A couple of diesel doods met at the car park to hook up
A couple of diesel doods met at the car park to hook up
by bigenff March 5, 2020

by Seventree April 17, 2019

A person who has no intention of using the "technical" use for a diesel truck. Instead of being simple, practical and functional, they heavily modify diesel their pick-ups with high performance modifications, loud exhausts, flashy wheels and street tires. Often used just for hot rodding.
He bought a low mileage one owner Cummins and lowered it on street tires, with compounds and a FMBV trans. He can't even tow with it anymore! He's such a Diesel Douche!
by anonymous August 5, 2023

Involuntary semi, caused by an unknown mix of vehicle vibration, women and the inevitable smell of diesel fumes leaking in through the back seats on a crappy public transport. Usually happens in a morning on the way to work.
8:30 AM - the bus is packed. It smells of diesel fumes as you sit on the back seat. The bus is old and vibrates like mental. A hot woman gets on the bus and you're suddenly aware of a semi, but you don't know what's caused it. 'Diesel Nob'
by roocifer July 15, 2010

by shane January 1, 2005
