The term "settling up" generally means paying off debts or resolving account balances. The antonyms for "settling up" could be phrases that indicate not paying off debts, delaying payments, or even avoiding payment altogether. Some possible antonyms could include ignoring debts, defaulting on loans, leaving debts unpaid, or even accruing more debt. While settling up suggests accountability and responsibility, its antonyms can imply carelessness, negligence, and dishonesty. Furthermore, by delaying or neglecting to settle up, individuals risk worsening their financial status in the long run. Therefore, it is essential to use responsible and proactive measures to settle up with creditors and maintain a healthy financial status.