behind someone's back

US /bɪˈhaɪnd ˈsʌm.wʌnz bæk/
UK /bɪˈhaɪnd ˈsʌm.wʌnz bæk/
"behind someone's back" picture
1.

pelas costas de alguém, sem o conhecimento de alguém

without someone's knowledge or without telling them

:
•
I can't believe she talked about me behind my back.
Não acredito que ela falou de mim pelas minhas costas.
•
They made the decision behind his back.
Eles tomaram a decisão pelas costas dele.
:
be on someone's backbehindstab someone in the backcover someone's backpat someone on the backsomeone's back is turnedget off someone's back