Cash in one's chips is a common idiom that means to die or to pass away. Antonyms for this phrase would include words or phrases that mean to stay alive or to continue living. Some antonyms could be "to live on," "to survive," "to stick around," "to stay with us," "to keep breathing," or "to push through." These words imply a sense of perseverance and determination to carry on, rather than giving up or succumbing to death. While cashing in one's chips is a natural part of life, we should always strive to keep pushing forward and living our best lives while we can.