The antonyms for the word "under bellies" can vary depending on the context. In general, antonyms for this phrase could include "upper", "surface", or "topside". These words indicate a location that is above or on top of something, rather than beneath it. Additionally, antonyms for "under bellies" could include terms that imply cleanliness or order, such as "tidy", "pristine", or "organized". These words convey a sense of purity or neatness, in contrast to the murky, hidden connotations of "under bellies". Ultimately, the choice of antonyms will depend on the intended meaning of the sentence in which the phrase appears.