twist someone's arm
US /twɪst ˈsʌm.wʌnz ɑːrm/
UK /twɪst ˈsʌm.wʌnz ɑːrm/

1.
誰かの腕をひねる, 誰かを説得する
to persuade someone to do something they do not want to do
:
•
I didn't want to go, but she twisted my arm.
行きたくなかったけど、彼女に腕をひねられた。
•
He didn't agree at first, but we managed to twist his arm.
最初は同意しなかったが、なんとか彼を説得した。