|“|| Buttercup: Wesley, what about the R.O.U.S's?
Wesley: Rodent's of unusual size? I don't think they exist.
|~ Wesley and Buttercup before being attacked by an R.O.U.S|
The Rodent of Unusual Size, or R.O.U.S for short, is the quaternary antagonist of The Princess Bride. As his name suggests, he is a giant rat who lives in the Fire Swamp. As Buttercup and Westley recover from the quicksand, the man in black wrestles with the rodent, until he stabs him dead.