Gossip is a mass medium or rumour, especially about the personal or private affairs of others; the act is also known as dishing or tattling.

Gossip has been researched in terms of its origins in evolutionary psychology, which has found gossip to be an important means for people to monitor cooperative reputations and so maintain widespread indirect reciprocity. Indirect reciprocity is a social interaction in which one actor helps another and is then benefited by a third party. Gossip has also been identified by Robin Dunbar, an evolutionary biologist, as aiding social bonding in large groups.

Etymology

The word is from Old English godsibb, from god and sibb, the term for the godparents of one's child or the parents of one's godchild, generally very close friends. In the 16th century, the word assumed the meaning of a person, mostly a woman, one who delights in idle talk, a newsmonger, a tat…Read more on Wikipedia