"Chaws on" is a phrase that usually describes the act of chewing or biting something repeatedly. Some of the antonyms for this phrase are terms like savor, relish, enjoy, or indulge. These words connote the idea of taking pleasure or enjoyment in what one eats rather than just mechanically chewing it. Another set of antonyms for "chaws on" could be phrases like discard, spit out, or reject, which imply the act of removing unwanted or unpalatable food from one's mouth. In essence, the antonyms for "chaws on" involve actions that contrast with the idea of mechanically or unenthusiastically biting something.