fecal matter hits the rotary impeller Share definition Flag Nice way of saying "shit hits the fan" You know you're in trouble when the fecal matter hits the rotary impeller. fecal matter hits the rotary impeller by Arioch1723 September 7, 2006 0 0 Get merch Get the fecal matter hits the rotary impeller mug. Buy Now — $32.95 See more merch