put your head on the block
US /pʊt jʊər hɛd ɑn ðə blɑk/
UK /pʊt jʊər hɛd ɑn ðə blɑk/

1.
colocar a cabeça a prêmio, arriscar a reputação
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.
Estou disposto a colocar minha cabeça a prêmio por este projeto porque realmente acredito nele.
•
He put his head on the block for his team, defending their controversial decision.
Ele colocou sua cabeça a prêmio por sua equipe, defendendo a decisão controversa deles.