BUTT DOPING Share definition Flag THE ACT OF RUNNING A BICYCLE PUMP UP YOUR ASS TO INTENSIFY A FART. what happened i thought you won the loudest fart contest? dude they found a bike pump in my backpack and disqualified me for butt doping BUTT DOPING by jmc1971 July 24, 2012 0 0 Get merch Get the BUTT DOPING mug. Buy Now — $32.95 See more merch