have your back against the wall
US /hæv jʊər bæk əˈɡɛnst ðə wɔl/
UK /hæv jʊər bæk əˈɡɛnst ðə wɔl/

1.
走投無路, 背水一戰
to be in a very difficult situation where you have few choices and are forced to do something
:
•
With the deadline approaching and no progress, we really have our backs against the wall.
隨著截止日期的臨近,卻沒有進展,我們真的走投無路了。
•
After losing his job and his home, he felt like he had his back against the wall.
在失去工作和家後,他感覺自己走投無路了。