stab someone in the back
US /stæb ˈsʌm.wʌn ɪn ðə bæk/
UK /stæb ˈsʌm.wʌn ɪn ðə bæk/

1.
menusuk dari belakang, mengkhianati
to betray someone, especially a friend or someone who trusts you
:
•
I can't believe she would stab me in the back like that after all we've been through.
Aku tidak percaya dia akan menusukku dari belakang seperti itu setelah semua yang kita lalui.
•
He felt completely betrayed when his business partner stabbed him in the back.
Dia merasa benar-benar dikhianati ketika rekan bisnisnya menusuknya dari belakang.