From Longman Dictionary of Contemporary Englishtattletat‧tle /ˈtætl/ verb [intransitive] 1 old-fashionedRUMOUR/RUMOR to talk about other people’s private lives SYN gossip2 DTELL A SECRET especially American English if a child tattles, they tell a parent or teacher that another child has done something badtattle on Robert is always tattling on me for things I didn’t do. → tittle-tattle —tattle noun [uncountable] —tattler noun [countable]→ See Verb table
Examples from the Corpus
tattle• She had only the power to tattle on us, and really not even that.• The chamber also said companies fear retribution from regulators they tattle on.tattle on• Robert is always tattling on me for things I didn't do.Origin tattle (1400-1500) Middle Dutch tatelen 