CASH IN

v. 1. To exchange (as poker chips or bonds) for the value in money. He paid the bill by cashing in some bonds. When the card game ended, the players cashed in their chips and went home. 2. or cash in one's chips slang To die. When the outlaw cashed in his chips, he was buried with his boots on. He was shot through the body and knew he was going to cash in.