Slurm Queen

The Slurm Queen lives in the Slurm Factory on the planet Wormulon. She produces from her behind what is the secret ingredient of Slurm and the only ingredient. It is squirted directly out her behind into Slurm cans in the factory. She tried to kill Fry, Leela, Bender and Slurms MacKenzie when they tried to expose the secret of Slurm.

Quotes

 * Slurm Queen: Honey comes from a bee's behind, milk comes from a cow's behind, and have you ever had toothpaste? Fry: Who's behind does that come from? Slurm Queen: You don't want to know!