'Fake news' is a phrase that is used to describe fictitious news that has no source, but is written and published as being truthful facts.
Example in use: "Don’t believe a word that author writes, he's known to be a master of fake news."
Interesting fact about Fake News
Facebook was the only media outlet that took responsibility and public action after the US elections in 2016. However, they are blamed for a data breach of 50 million users that was used to manipulate the elections.
