deep throat

a person who provides information about another's wrongdoing an accountant who had turned deep throat, he was the first to leak the information that the company had been cooking its books for years Synonyms betrayer, canary [slang], informer, fink, informant, nark [British], rat, rat fink, snitch, snitcher, squealer, stoolie, stool pigeon, talebearer, tattler, tattletale, telltale, whistle-blowerRelated Words collaborator; blabber, blabbermouth, gossip, gossiper, leaker; snoop, snooper, spy; notifier