The phrase "most champing" is often used to describe someone or something that is eagerly anticipating or ready to take action. Synonyms for this phrase include "eagerly chomping," "anxiously gnawing," "keenly biting," and "voraciously devouring." These words all convey the idea of intense excitement or anticipation. Other synonyms for "most champing" might include phrases like "fervently hungering," "avidly yearning," or "zealously desiring." Whether you're writing about a famished animal or a determined athlete, these words can help convey the sense of eager anticipation that drives them forward.