See tattler in Webster's New World Roget's A-Z Thesaurus II
noun
A person habitually engaged in idle talk about others:
blab, gossip, gossiper, gossipmonger, newsmonger, rumormonger, scandalmonger, tabby, talebearer, taleteller, tattle, tattletale, telltale, whisperer. (Slang) yenta. See wordsOne who gives incriminating information about others:
informant, informer, tattletale. (Informal) rat, tipster. (Slang) fink, snitch, snitcher, squealer, stoolie, stool pigeon. See knowledge, law
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