hellafast is pretty damned quick. It's not as fast as stupidfast, but it'll still smoke things that are just "fast". e.g., ASDL is hellafast, compared to a 56K modem.
Man, this rig is hellafast. It beats the hell outta my dual celly rig.
by djv January 20, 2003
the speed at wich Mr. T's 1982 custom AMC van travels at.
Mr. T's van is "hellafast"
by Vegas March 24, 2003