Getting off the hook, essentially means avoiding consequences or punishment for something. The concept of 'getting off the hook' implies a certain level of culpability or responsibility for one's actions. Antonyms for this phrase, therefore, might include phrases such as 'taking responsibility', 'acknowledging wrongdoing', or 'facing the consequences.' Essentially, the opposite of getting off the hook would be owning up to one's actions and being accountable for the impact they have caused. Embracing these concepts and taking responsibility for one's actions is often seen as a sign of personal growth and maturity.