swing for

verb3

1. •
   To be hanged for a crime.
2. •
   Swing for someone: To be hanged for murdering someone.

   • I'll swing for him, when I get out. Katherine Lynch reported in “Minor Matters: Willing to "Swing for Him."”, in Weekly Mail, Cardiff, 20 June 1908, page 10
3. •
   (informal) To be punished severely.