1. The term used to describe one who has surpassed being a regular diesel individual, and going to the point of Diesel Horse!
2. The act of basically owning whatever you are working on.
"Man he looked like a diesel horse, as he socked him in the nose."
"Barry Bonds if you want to be a diesel horse, just close you eyes, and let us put this needle in you. It is just saline to clean out your system."
"I just Diesel Horsed them noobs on the PS3!"