blabbermouth
Pronunciation:
/ˈblæb.ə(ɹ)ˌmaʊθ/noun
Definitions
A gossip.
Example: If it weren't for that blabbermouth Sally, the principal would never have known we did it.
A person who talks excessively.
Synonyms:chatterboxA kind of foam-dispensing nozzle used in firefighting at airports.