to stab somebody in the back
01
to be disloyal and ungrateful to someone who has trusted or supported one
![to [stab] {sb} in the back definition and meaning](https://cdn.langeek.co/photo/44598/original/?type=jpeg "to [stab] {sb} in the back definition and meaning")
Idiom
Informal
예시들
I thought we were close friends, but he stabbed me in the back by spreading rumors about me.
She promised to support my project, but then she stabbed me in the back by working against it behind my back.
