Yelp is a website where people can create reviews on local businesses. The website exists in real life as well. In "You're Not Yelping", Yelp reviewers intimidate restaurant owners with the threat of a 1 star review. In response to the many negative reviews, the restaurant owners kick out yelpers. The Yelpers respond with extreme violence, led by Cartman. When the restaurant owners let the Yelper's back in, they deface their meals with disgusting stuff.