Flushroom Cloud Share definition Flag the invisible cloud of fecal matter that is thrown into the air when a shitty toilet is flushed I'm renaming that bathroom Hiroshitma after the flushroom cloud I created. Flushroom Cloud by MalkyMalk February 1, 2013 0 0 Get merch Get the Flushroom Cloud mug. Buy Now — $32.95 See more merch