To betray by informing on.
Often said of children: to report incriminating information about another person, or a person's wrongdoing; to tell on somebody.
To chatter; to gossip.
A tattletale.
Often said of children: a piece of incriminating information or an account of wrongdoing that is said about another person.
Idle talk; gossip; (countable) an instance of such talk or gossip.