blabber-mouth, blabbermouth slang (orig. U.S.).
(ˈblæbəmaʊθ)
= blabber n.
1936 Steinbeck In Dubious Battle xiii. 249 One minute he's a blabber-mouth kid. 1956 D. Karp All Honorable Men 174 No, Burney isn't a blabbermouth. He tells you a lot less than he knows. 1959 I. & P. Opie Lore & Lang. School-children x. 189 One who blabs to a teacher or to a senior is a ‘blabber-mouth’. |