bumballed Share definition Flag when you sit down and squash your low hanging scrotum and balls under your arse.usually when its hot and sweaty. oh dude,i just bumballed myself on that chair ,nearly ripped the fuckers right off ! bumballed by Adam the definer ! June 17, 2015 0 0 Get merch Get the bumballed mug. Buy Now — $32.95 See more merch