let the cat out of the bag
成語所屬單字bag
let the cat out of the bag — 慣用語
1. to tell people about something that was meant to be a secret, often by mistake.
1.慣用語
釋義
洩露秘密；走漏風聲
to tell people about something that was meant to be a secret, often by mistake.
例句
Rohan let the cat out of the bag about the surprise party.
Don't let the cat out of the bag — the engagement is still a secret.