backside trots Share definition Flag Synonym for diarrhea. Excessive and frequent evacuation of watery feces. The stomach flu gave me a serious case of the backside trots. I was running to the toilet every 5 minutes. backside trots by Robert Moto July 7, 2006 0 0 Get merch Get the backside trots mug. Buy Now — $32.95 See more merch