back sb into a corner

back sb into a corner (to give someone no choice but to do what you wish for him/her to do) — загнать кого-л в угол (безвыходное положение)

Example: "I didn't want to give her my watch but I felt like I was backed into a corner once she mentioned the fact that she had saved my brother's life. The people around me would have thought I was a schmuck if I didn't do it! I had to!"

see also
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