Most notably found in wave pools at water parks, they are pieces of excrement floating in public waters. It is not known where they come from, but based on size and density they most likely come from toddlers, wearing diapers not meant for use in turbulent waters. They may also be a rare find in lazy rivers.
Rose: Andrew, what is that streak on your face?
Andrew: A wave just hit me with a Rogue Turd!