Maw luur

A maw luur was a giant slug-like creature engineered by the Yuuzhan Vong to be a living sewer system. They were immobile and simply grew and expanded into whatever space they were put in... which was usually underneath a large city. Thousands of Yuuzhan Vong crapped in the maw luur's mouth every day.

The maw luurs were the most miserable creatures in all of existence. I once asked a Buddhist friend of mine, "What kind of karma a person have to have, in order to be reincarnated as a maw luur?" He slapped me in the face and said, "That's Hinduism, not Buddhism, you idiot." So I asked a Hindu friend of mine the same question, and he said, "Not even Hitler would be reincarnated as something that disgusting." Huh. Then I asked him if karma was strictly a Hindu concept or whether Buddhists believed in it too, and he said, "What? No, no, Buddhists believed in karma. Why?" "No reason," I said, and the next day I beat the crap out of my Buddhist friend for lying to me.