Merriam Webster's Collegiate Dictionary defines a gossip as someone who habitually reveals personal, or sensational, facts about another.

As to gossip, the Bible tells us that a child of God should not let any unwholesome talk come out of their mouth; only what is helpful for building others up according to their needs that it may benefit those who listen. (Ephesians 4:29)

Gossip is out of place for a Christian; or anyone else. (Ephesians 5:4) In fact, the Bible tells us that a gossip should be avoided. (Proverbs 20:19) It also tells us that just as a fire goes out without wood, a quarrel dies down when gossip ceases. (Proverbs 26:20)