Chupacabra

Chupacabra is a kind of monster that was mentioned by Gordon Walker in Bloodlust and again by Dean in Yellow Fever.

Background
Not much is known about the Chupacabra due to the fact that it was only mentioned. It is menitoned in the episode Bloodlust when Gordon tells Sam and Dean he's more of a go-it-alone type of a guy to which Dean responds with "Come on, man, I've been itching for a hunt" to which Gordon responds with "Sorry. But hey, I hear there's a chupacabra two states over. You go ahead and knock yourselves out."

It is mentioned again in Yellow Fever after Sam and Dean investigate the death of a victim of ghost sickness and Sam asks Dean what could scare someone to death to which Dean responds with "What can't? ghosts, vampires, chupacabra? It could be a hundred things."

Appearances
Season 2

Bloodlust (mentioned only)

Season 4

Yellow Fever (mentioned only)