Blew out of the water is an idiomatic expression meaning to surpass or defeat someone or something completely. Some antonyms for this phrase include "fell short," "missed the mark," "failed to meet expectations," or "underperformed." These antonyms imply that the subject was unable to achieve the desired outcome or simply did not live up to expectations. Another possible antonym is "matched expectations," which suggests that the subject performed adequately or met the expectations set for it. Other antonyms may include "came in behind" or "came close but not close enough," which imply that there was some level of success but not enough to surpass the competition fully.