[TOP]big mouth 'big mouth noun (informal)a person who talks a lot, especially about him- or herself, and who cannot keep secrets 多嘴的人；自吹自擂的人；嘴不严的人 • 'big-mouthed adj.[TOP]big mouth informal disapproving noun countable usually singular » If someone is or has a big mouth, they often say things which are meant to be kept secret 多嘴的人 He is/has such a big mouth. 他太多嘴了。 He went and opened his big mouth and told them the whole story. 他去了，并且多嘴多舌地把整件事告诉了他们。 [TOP]big mouth
1.N-COUNT 可数名词 大嘴巴；不能保守秘密的人 If you say that someone is a big mouth or that they have a big mouth, you mean that they tell other people things that should have been kept secret.