put your head on the block

US /pʊt jʊər hɛd ɑn ðə blɑk/
UK /pʊt jʊər hɛd ɑn ðə blɑk/
"put your head on the block" picture
1.

自分の首を賭ける, 責任を負う

to risk your reputation or position by supporting something or someone, especially when there is a chance of failure or criticism

:
I'm willing to put my head on the block for this project because I truly believe in it.
このプロジェクトのためなら、自分の首を賭けてもいい。本当に信じているからだ。
He put his head on the block for his team, defending their controversial decision.
彼はチームのために自分の首を賭け、彼らの物議を醸す決定を擁護した。