The phrase "more gut-busting" implies that something is extremely funny or hilarious. However, there may be instances where one may want to describe something as the opposite of "gut-busting," such as a boring or uninteresting experience. In this case, some antonyms for "more gut-busting" include unexciting, uninspiring, unamusing, dull, and uneventful. These words describe a lack of excitement or engagement, which is the polar opposite of the laughter-inducing experience that "more gut-busting" implies. It is essential to know both the synonyms and antonyms of a word to effectively convey the intended meaning.