The phrase "calling bets off" refers to cancelling or withdrawing a commitment or agreement that had been made previously. The antonyms for this phrase could include "committing fully", "honoring the pact", "standing by the word", or "seeing it through". All these phrases indicate a sense of responsibility and reliability, with a willingness to keep one's promise and follow through with the agreement. On the other hand, "calling bets off" implies a lack of follow-through, wavering on one's commitment, or perhaps even reneging on a promise. When making an agreement or commitment, it is important to consider the consequences of backing out and the potential impact on others involved.