The idiom "Twist
someone’s arm" generally means to persuade someone to do something. If
someone twisted your arm, it means that someone has done a great job of
convincing you to do something you might not have wanted to do.
For Example:
“They had to twist his arm, but they got him
to join the project”
This is the Idiom #97 in the List of 100 commonly used Idioms in everyday English (Top 100 famous Idioms). By introducing this list of notable idioms to English learners and ESL students as you, we believe that your English will sound more like a native and you can easily understand what native speakers are saying. Please like and share this list with your friends if you think it is helpful - the full list is here.