throw someone under the bus
US /θroʊ ˈsʌm.wʌn ˈʌn.dər ðə bʌs/
UK /θroʊ ˈsʌm.wʌn ˈʌn.dər ðə bʌs/

1.
누군가를 희생시키다, 누군가를 배신하다, 누군가에게 책임을 전가하다
to betray or sacrifice someone, especially to save oneself from blame or difficulty
:
•
He decided to throw his colleague under the bus to avoid getting fired.
그는 해고를 피하기 위해 동료를 희생시키기로 결정했다.
•
I can't believe she would throw me under the bus like that.
그녀가 나를 그렇게 희생시킬 줄은 몰랐어.