Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun blabbermouth
1 sense of blabbermouth
Sense 1
tattletale, tattler, taleteller, talebearer, telltale, blabbermouth -- (someone who gossips indiscreetly)
=> gossip, gossiper, gossipmonger, rumormonger, rumourmonger, newsmonger -- (a person given to gossiping and divulging personal information about others)