behind someone's back

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

a espaldas de alguien, sin que alguien lo sepa

without someone's knowledge or without telling them

:
•
I can't believe she talked about me behind my back.
No puedo creer que hablara de mí a mis espaldas.
•
They made the decision behind his back.
Tomaron la decisión a sus espaldas.
:
be on someone's backbehindstab someone in the backcover someone's backpat someone on the backsomeone's back is turnedget off someone's back