What is fake news anyway? Fake news websites publish fake stories, propaganda, and patently false information. They usually use social media as a medium. The purpose of these sites is to mislead and gather clicks for advertisement revenue. Satire sites such as the Onion aren't considered "fake news" as they are designed to entertain, as the reader understands that the news is written as comedy.
Use this search engine to look for news stories that you suspect may be FAKE NEWS. The sources are factcheck.org, politifact.com, snopes.com, and the Washington Post's Fact Checker.