A factoid was originally defined to mean a false statement presented as a fact. In colloquial speech, it is often used to mean a true but brief or trivial item of news or information.
A common factoid is the incorrect claim that the Great Wall of China is visible from space with the naked eye.
"Chuck Norris facts", also known as Chuck Norris jokes, are humorous factoids about the late American martial artist and actor Chuck Norris that have become an Internet meme widespread in popular cult
Factoid
…a spurious fact. The term factlet has been used in publications such as Mother Jones, the San Jose Mercury News, and in the Reno Gazette Journal. Chuck Norris facts Communal reinforcement…
Protest banner at the University of Bamberg alluding to Chuck Norris facts (German: "Only Chuck Norris manages to achieve a bachelor's degree in scheduled time")