have someone over a barrel
US /hæv ˈsʌm.wʌn ˈoʊ.vər ə ˈbær.əl/
UK /hæv ˈsʌm.wʌn ˈoʊ.vər ə ˈbær.əl/

1.
窮地に追い込む, 意のままに操る
to have someone in a position where they are forced to do what you want, often because you have an advantage over them
:
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The company knew I needed the job, so they really had me over a barrel with the low salary offer.
会社は私がその仕事を必要としていることを知っていたので、低い給与提示で私を窮地に追い込んだ。
•
If you owe someone money, they might have you over a barrel.
誰かに借金がある場合、彼らはあなたを窮地に追い込むかもしれません。