cash in one's chips

verb2

1. •
   To discontinue an activity, accepting whatever gains or losses one has incurred; to give up.

   • "Looks like these grandees'll have to cash in their chips and quit, but it's a darned shame." — 1913
2. •
   To die.

   • A tough old hombre, unregenerate to the last, cashed in his chips in Oklahoma City the other day. — 1950