kaboomshit Share definition Flag a sound you make when you put a firecracker in a tiolet and shit at the same time. oh shit, man dont throw that firecracker in here........KABOOMSHIT, damnit now my ass is bleeding. kaboomshit by jpmjr95 February 19, 2009 0 0 Get merch Get the kaboomshit mug. Buy Now — $32.95 See more merch