What is the word for something that is like a cliche but isn't really old yet? Some phrase, claim, or belief that is trending but is so new that you couldn't really call it cliche.
For example, often people hear things touted on the news as fact and begin repeating those things, which then become a new and commonly held belief. For example, if I were to say that the Corona virus is like the flu, everybody would quickly correct me and say that it is NOT like the flu. This claim which is new becomes widely believed, loudly defended, and often repeated. Everyone says it because everyone says it. It becomes stuck in the collective mind of the public and everyone repeats it.