A rumor is one thing that gets thicker instead of thinner as it is spread. — Richard Armour
Rumor is a tall tale of explanations of events circulating from person to person and pertaining to an object, event, or issue in public concern. In the social sciences, a rumor involves some kind of a statement whose veracity is not quickly or ever confirmed. In addition, some scholars have identified rumor as a subset of propaganda. Rumors are also often discussed with regard to “misinformation” and “disinformation” (the former often seen as simply false and the latter seen as deliberately false, though usually from a government source given to the media or a foreign government). — Wikipedia
Gossip is idle talk or rumour, especially about the personal or private affairs of others; the act is also known as dishing or tattling. — Wikipedia
Here are links to pages about closely related subjects.
Entertainment Humor, Toy, Hobby, Competition (Game, Sport), Spectacle
Arts Performing, Visual (Architecture), Culinary, Language (Poem), Music, Dance
Belief Hypothesis, Forecast, Rumor, Superstition, Folklore, Faith