The loose piece of toilet paper that often floats up out of the bottom or throat of the toilet. This is usually cause by too many things being swallowed by the Toilet Monster at one time. Looks kind of like a ghost.
The Toilet Monster was full after my serious two flush mega casper-the-friendly-compost, infinite-firehose, shit. So it puked back up a Cottonelle Caper for the dog to play with.