Synonyms to blow the whistle

bear witness against, betray, blab, fink, inform against, inform on, narc, peach, rat, sell out, snitch, snitch on, squeal, stool, tattle, tell on, testify against, turn informer, babble, back-fence gossip, be indiscreet, be unguarded, betray a confidence, blabber, blather, blether, blurt, blurt out, buzz, chatter, chitchat, clatter, cry, divulge, give away, gossip, gossiping, gossipmongering, gossipry, grapevine, groundless rumor, hearsay, idle talk, inform, jabber, leak, let drop, let fall, let slip, natter, newsmongering, piece of gossip, prate, prattle, retail gossip, reveal, reveal a secret, rumble, rumor, scuttlebutt, sing, spill, spill the beans, story, tale, talebearing, taletelling, talk, tattle on, tell, tell idle tales, tell secrets, tell tales, tittle-tattle,