have a loose tongue
成語所屬單字loose
have a loose tongue — 慣用語
1. To talk too much and reveal information that should be kept secret.
1.慣用語
釋義
大嘴巴；嘴巴不緊
To talk too much and reveal information that should be kept secret.
例句
Don't tell Anthony any secrets — he has a loose tongue and will tell everyone.
The spy was caught because his contact had a loose tongue at the café.