Powerfatty 

Refers to overweight powerlifters. Since powerlifters train for strenght instead of aesthetics they often have a very high body fat.

Look at that powerfatty over there squatting 700lbs

Powerfatty by AniviaS March 29, 2023

powerfarting 

Flatulence that emerges with such a powerful velocity and ear-shattering roar that people nearby have been literally startled to death.

I had a cousin who was a powerfarting champion who once, at Thanksgiving, powerfarted at the dinner table and some folks dropped involuntarily down into the fetal position, thinking it was nuclear war!

powerfarting by Dr Bunnygirl November 28, 2019

Powerfart 

To push a fart out with more force than is necessary, to tear ones sphincter, almost rosebudding afterwards...

Dean - "Dude i totally just cranked a stonker, checkit!!"
Dan - "Shivers mate i think u just split ur ass!!!"
Dean - "Yeah powerfart to the max"

Powerfart by Defcon58 December 15, 2008