The action of projecting vomit in a linear intense stream.
"It looks like someone power-barfed into a shot glass"
by Mike Regina October 16, 2007
1 more definition
To vomit up an energy bar during strenuous physical activity.
I just did a powerbarf and the top of that hill. I think it was the peanut butter chocolate chip with vanilla icing!
by Mark Shackelford April 24, 2007