Moof

A moof was a creature of the galaxy that had hoofed feet and a thick hide, and secreted milk. Moof milk could be used to make yogurt. There were individuals who milked moofs, which inspired the term "moof-milker," an insult to a person's intelligence. After recovering the Millennium Falcon, Han Solo used the insult in reference to whoever added a compressor to the ship's hyperdrive; in this case, it was Unkar Plutt, the previous owner of the ship.