What is "jewpacabra"

"Jewpacabra" is the fourth episode of the sixteenth season of the American animated sitcom South Park, and the 227th episode of the series overall. It premiered on Comedy Central in the United States on April 4, 2012. In this episode, South Park's big Easter egg hunt is in jeopardy when there are rumors of a dangerous beast lurking in the woods nearby. Cartman tries to warn everyone that their lives are at risk if they participate in the egg hunt. No one believes him until he produces video evidence of the mysterious being.