look up any word, like the eiffel tower:
 
15.
The most prominent term for heroin on the urban streets of Philly
The editors at urban dictionary are so out of touch with street slang they don't know a work is used for mainline use of diesel
by Phmns51 October 16, 2013
 
16.
A girl that is big and ugly. Like a truck that only takes diesel gas.
Wow, that girl is diesel.
by Not A Diesel January 04, 2014
 
17.
Higher than normal % beer.
"Did you want a Coors?" "Na, I'll take a diesel" (Budweiser)
by AndyCrayCray January 16, 2013
 
18.
badass, able to take large hits in one breath
"damn diesel you just took that in one hit!"
by Uneasy A October 04, 2011
 
19.
Usually one of two things. One, a type of fuel - handy for powering cars and whatnot. More importantly however, it's the best fashion brand ever. Diesel is special. Everything it touches is exquisite. The good people at Diesel bring us clothes that have the power to make us feel fuzzy inside. It's that feeling when you watch a Lady Gaga or 3OH!3 music video for the first time. You may not be fans, but admittedly their music videos are hard to keep your eyes off. It's like the euphoria associated with that - very exciting! Even the Diesel campaigns are cool. I mean, the whole "for successful living" mantra they've got going on. What's more, the "be stupid" philosophy is amazing. They even brought videos to places like Facebook and YouTube to elaborate on the meaning behind the philosophy. I don't mean to go on, I really don't. Although, bottom line - Diesel is cool!
Tyler: Life is good. I'm goin' to the Diesel store tonight!
by MyUDpseudonym September 25, 2010
 
20.
A street term for heroin.
Paco and I purchased some potent diesel today.
by flaco August 27, 2002
 
21.
A brand of jeans and other clothing.
Dam! He looks so hot in his new diesel jeans.
by Caleb November 17, 2003