The act of driving very fast on a road or highway or street. Can also be applied to the act of pursuing a personal or professional goal. Originated in the 1960's, originally used in Brooklyn NY, describing a return trip from the Catskills in Upstate NY.
"I had to be back to light the boiler at the plant, so here I am barrel assing down the highway right past a cop." "He is determined, I mean he's barrel assing toward his goals."
Going ridiculously fast, preferably down hill.
So i was on my sled, right, and i was barrel-assing down the hill...
Woah.. did you see that Viper go barrel-assing past us?
Driving at high speed through an area not intended for vehicles.
How did you break your arm?
We were barrelassing through the field and rolled the go-kart.