My lips are sealed
입도 뻥끗 안할게

John: By the way， May. My lottery winnings are off the record.
May: Do you understand? This is just between you and me.
May: My lips are sealed. But why is that?
John: I will tell you about it later.
May: Come on， John. You can tell me.
John: It's about my mom...

* ~ is off the record: 기록에서 제외된 = 비밀이야
= May， just play dumb. - May， 그냥 모른 척 해.
:This is not to be reported. 이건 보고되면 안돼 = 알리면 안돼.
:~ between you and me : 너와 나사이의 일이야 = 너와 나만 알아야 해.
* My lips are sealed. : 내입은 봉인됐어 = 입도 뻥끗 안 할게.
= I won't tell a soul. 아무에게도 말 안 할게.
I will take it to my grave. 내 무덤까지 가지고 가지.