When it comes to expressing disliking or disagreeing with something, there are several antonyms for the phrase "stomach something". These antonyms vary based on the context, but some of the most common ones include "reject", "refuse", "abhor", "detest", "disapprove", "dislike" and "oppose". While "stomaching something" implies tolerating something distasteful or unpleasant, its antonyms convey a sense of opposition, rejection or active disapproval. So, if you find yourself unable to stomach something, don't hesitate to use one of these antonyms to convey your true feelings towards it.