tattle
tat-tle
verb
To reveal secrets or gossip about others, often children reporting misbehaviour.
"Don't tattle on your classmates."
noun
Idle talk or gossip, especially about other people's private matters.
"Ignore all the schoolyard tattle."
Thesaurus
Synonyms: telling, singing, gabble, prate, gibber, maunder, clack, tittle-tattle, palaver, blabber, twaddle, blab
Antonyms: keep one's mouth shut, keep quiet, shut one's mouth