In the 1973 novel The Princess Bride, Buttercup and Westley are taken by surprise when they are suddenly attacked by “rodents of unusual size,” or ROUS. The book describes the beasts as a ...
As You Wish: Inconceivable Tales from the Making of The Princess Bride ... Problems With the Rodents of Unusual Size The R.O.U.S.’s were actually little people wearing rat costumes.