behind someone's back
US /bɪˈhaɪnd ˈsʌm.wʌnz bæk/
UK /bɪˈhaɪnd ˈsʌm.wʌnz bæk/
1.
뒤에서, 몰래
without someone's knowledge or without telling them
:
•
I can't believe she talked about me behind my back.
그녀가 내 뒤에서 내 얘기를 했다니 믿을 수 없어.
•
They made the decision behind his back.
그들은 그의 등 뒤에서 결정을 내렸다.