The Rancor is a giant reptilian like creature with long claws. It was first shown in Star Wars Episode VI: The Return of the Jedi, where Luke Skywalker was thrown into a pit to fight against a specimen of rancor.
Attorney Scott Greenberg battles the Rancor in "Peterotica" when he represents the plaintiff who is suing Carter Pewterschmidt.
Rush Limbaugh appears as the Rancor in It's A Trap!.
The Rancor is trapped, along with Peter, in Quagmire's basement as part of a weight-loss program in "Family Guy Lite".