burn one's bridges behind one 不留后路

过了桥，就烧了它（having crossed it, you could always burn the bridge），这个表达是指“切断所有退路”。类似的表达还有破釜沉舟（burn one's boats）。

例：

I'd already burned my bridges with my previous employer by publicly criticizing their products.

我公开批评原来就职的公司的产品，已经切断了再回去工作的退路。