The Lethargians are a group of unresponsibly lazy, yet mischevious, dividing slime creatures featured in the book and film "The Phantom Tollbooth", and they live in The Doldrums a dark swampy place filled with what appears to be mucus, to vistors, they pretend to have a law that includes rules for being there such as no thinking, paying attention or laughing allowed, and smiling is permitted only on alternate Thursdays, they spend most of their time lying around, sleeping, or converting from solids to liquids when touching them.