Diesel is not car fuel and oil mixed together, it's not a type of "gas," it is a lower-grade petroleum distillate used in DIESEL ENGINES which has a much higher flashpoint and whose fumes are non-explosive as opposed to gasoline's. Diesel engines use "compression-ignition" (the heat of highly compressed air in the combustion chamber) to ignite a very fine mist of diesel fuel. Used in heavy-duty trucks, generators, pumps, etc. for their higher specific torque (vs. gasoline) and greater fuel efficiency. Modern diesels are very clean, efficient, smooth, and quieter.
by Hammond B-3 October 30, 2003

by flaco August 27, 2002

A brief use of the word in a conversation:
Dealer: Yo what you need man?
Buyer: i'm looking for diesel bro
Dealer: i got you
Dealer: Yo what you need man?
Buyer: i'm looking for diesel bro
Dealer: i got you
by PJ April 8, 2004

A) Strong, huge, ripped, muscular, swole, buff
B) Hella expensive clothing line that sells sexy underwear with "DIESEL" on the front
B) Hella expensive clothing line that sells sexy underwear with "DIESEL" on the front
by iBJocking February 28, 2012

by gangstaaaaaaaaaaa January 15, 2009

by J-Rock April 16, 2005

outside QuickTrip, the interior of a 1989 Ford Probe...
Christian: You want something to drink?
Grant: Can of Diesel.
Christian: A 2 by 4?
Grant: That's what I said.
Christian: You want something to drink?
Grant: Can of Diesel.
Christian: A 2 by 4?
Grant: That's what I said.
by Edapoe March 15, 2009
