Antonyms for the phrase "cashes chips" can be a bit tricky, as it is not a commonly used phrase. However, we can come up with a few options. The word "hoards" could be used to represent the opposite of "cashes chips," with a person holding onto their chips instead of exchanging them for money. Similarly, "stashes" could be another antonym suggesting the act of keeping chips rather than exchanging them. "Loses chips" could also be considered as an antonym, representing the opposite of cashing in chips, with a person losing their chips and receiving nothing in return. Additionally, "gambles away" could be another alternative, meaning that the chips are being used in the game without the intent of exchanging them for money.