back against the wall
陷入困境或危险境地，无法逃脱或变通的情况
口语·形容陷入绝境或别无选择
英文释义
being in a difficult or desperate situation with no way to escape or progress
例句
With no money and no job, he had his back against the wall and had to ask for help.
典故来源
源自军事或搏斗场景，当人背靠墙壁时无法后退，比喻陷入绝境。