The Pants that the Servant of Darkness, Sauron, if you will, Is renound for wearing during his campaign against the good peoples of Middle Earth. These Pants have been known to change on Sunday, when Sauron plays golf with the Witch King of Angmar and Tom Bombadil.
This is also a term used to establish dominance in a relationship.
Wife: Honey, I wanna buy these shoes.
Man: NO! NO SHOES FOR YOU!
Wife: But why not?! I am buying the shoes!
Man: NO! I WEAR THE SAURON PANTS IN THIS RELATIONSHIP!