off the hook
原文解釋: free from an obligation
中文解釋: 脫身, 溜掉, 擺脫危境
A. I heard you are in charge of the manager at your company.
B. Ya, but I told the boss it's too stressful and he let me off the hook.
A. I was supposed to baby-sit my nephew this weekend,
but my sister in law found this great baby sitter, so I got off the hook.
B. Great, lets go watch the movie like we planned.