(countable) A tattletale.

(countable, Canada, US, derogatory) Often said of children: a piece of incriminating information or an account of wrongdoing that is said about another person.

(uncountable) Idle talk; gossip; an instance of such talk or gossip.

(intransitive) To chatter; to gossip.

(intransitive, Canada, US, derogatory) Often said of children: to report incriminating information about another person, or a person's wrongdoing; to tell on somebody.