Toilet Crums Share definition Flag 1. This is the shit that remains in the toilet bowl after it as been mal-flushed. It is not a plesant sight for the next person. - "Ew! There are some Toilet Crums!" Toilet Crums by CrunkMonk3y January 2, 2012 0 0 Get merch Get the Toilet Crums mug. Buy Now — $32.95 See more merch