When one says they are "calling all bets off," it means that they are cancelling a previously made decision or agreement. Some antonyms for this phrase could include "making a firm decision," "committing to a plan," or "upholding an agreement." Essentially, when one is "calling all bets off," they are retracting their previous stance and changing their mindset. Antonyms for this phrase imply that one is being resolute in their decision and is not wavering in their decision-making. These antonyms highlight the importance of making clear, informed decisions and sticking to them, rather than being indecisive or easily swayed.