Definition of put the arm on in English:

put the arm on

phrase

North American
informal
  • Attempt to force or coerce (someone) to do something.

    ‘she started putting the arm on them for donations’
    • ‘When Sam arrives to put the arm on Norman, it can be said that neither actor inhabits his role.’
    • ‘To be dubbed a Ranger or a Patriot used to mean that one had gone as far as one could go in putting the arm on business colleagues for individual donations, which were then grouped into eye-popping wads.’