acidic floater Share definition Flag Floating fecal matter that burns your anus like acid as it exits your rectum into the toilet. "OWWW! Acidic floaters flying out my ass! More butt wipe please." acidic floater by Ink Spot Mike May 31, 2007 0 0 Get merch Get the acidic floater mug. Buy Now — $32.95 See more merch