diarheafuck Share definition Flag when you have diarhea so bad it feels like somebody's fucking you from inside the colon. tom: man i was sick last week it was so bad i was getting diarheafucked. diarheafuck by babagonooshy February 11, 2009 0 0 Get merch Get the diarheafuck mug. Buy Now — $32.95 See more merch