The phrase "was with it" typically implies that someone or something is currently up to date or aligned with current trends or norms. Antonyms for this phrase could include "outdated," "behind the times," or "obsolete." Additionally, words like "uncool," "unfashionable," and "dated" could be used to suggest that something is no longer considered desirable or relevant. When describing someone who is not keeping up with current trends, you might say they are "uninformed," "unaware," or "out of touch." Whatever term you choose, the antonyms for "was with it" all convey a sense of disconnection from the current moment or prevailing attitudes.