throw someone under the bus

US /θroʊ ˈsʌm.wʌn ˈʌn.dər ðə bʌs/
UK /θroʊ ˈsʌm.wʌn ˈʌn.dər ðə bʌs/
"throw someone under the bus" picture
1.

誰かを犠牲にする, 誰かを見捨てる, 誰かに責任を押し付ける

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.
彼は解雇を避けるために、同僚を犠牲にすることにした。
I can't believe she would throw me under the bus like that.
彼女が私をそんな風に見捨てるなんて信じられない。