"Blows out of water" is an idiom used to refer to a situation where one thing outperforms or surpasses another. The antonyms for this phrase could be "inferior" or "less impressive." For instance, if a team fails to meet expectations during a game, one could say that they were completely blown out of water by their opponents. The opposite of this scenario would be a situation where the team performed exceptionally well and triumphed over the other team, leaving them outmatched or inferior in comparison. Therefore, the antonyms for "blows out of water" would be words like "underperformed," "unimpressive," and "inferior.