between you and me
US /bɪˈtwin ju ænd mi/
UK /bɪˈtwin ju ænd mi/

1.
너랑 나만 아는 얘기지만, 비밀로
said when you are telling someone something confidentially
:
•
Just between you and me, I think he's going to resign.
너랑 나만 아는 얘기지만, 그가 사임할 것 같아.
•
What I'm about to tell you is strictly between you and me.
내가 말하려는 건 철저히 너랑 나만 아는 얘기야.