Diesel 

A diesel is a defecation so large that your anus hurts and your toilet bowl is full.

"Dude I just took the Diesel 'D' yesterday."
"WOW, I gotta take a Diesel right now!"

Diesel by vin-diesel-nipples/red bull December 28, 2005

diesel 

street slang for afghan heroin

ayyo, syed shippin over some of that diesel!

diesel by Da Chef January 13, 2006

diesel 

good for lynching, burns hotter than gasoline

"Burnt dem niggers nice with diesel"

diesel by Derekkk July 16, 2008

diesel 

Large, awe-inspiring.

Those titties are diesel.
My arms are diesel.

diesel by dude April 10, 2004

diesel 

In Boston} a lesbian who looked very masculine. With hair cut almost to a crew cut, or bald. Also, defined [woman who worked out the the extent that become flat chested. Frequently the female bouncers at clubs near Boston University or Fenway Park were diesel's

Tend to be strongly feminist, refer to themselves as womyn not woman.

My friend got wicked embarrassed when she realized the dude she was flirting with was a diesel.

diesel by J Dumas December 14, 2007

Diesel  

A term used when separating Budweiser from other beers commonly known as un-leaded.

Joey was drinking Diesel all night and threw up all over the lake. Good thing we were all drinking un-leaded.

Diesel by A. Simon October 16, 2008

Diesel 

A word used as a positive meaning toward sexy women and very good drugs.

Damn that chick is a straight diesel!

That is some diesel ass chronic!

Diesel by brentmaster5 November 11, 2009