Twist somebody's arm - Idioms by The Free Dictionary
twist somebody's arm
twist (one's) arm
To pressure or force one into doing something. Oh, she immediately agreed to come tonight—I didn't even have to twist her arm. They had to twist my arm to convince me to start volunteering, but when I finally did, I realized how much I loved it.
ˌtwist somebody’s ˈarm (informal, often humorous) force or persuade somebody to do something, but not by using physical force: ‘Do you think Jane will lend us her car?’ ‘I think we could probably twist her arm.’