The phrase "chomping bit" typically implies eagerness and excitement, but there are several antonyms that convey the opposite emotions. Some options include "dragging heels," "lackadaisical pace," "uninterested saunter," "half-hearted trot," or "languid stroll." These phrases suggest a lack of enthusiasm, focus, or urgency. Other antonyms could include "delayed start," "hesitant approach," "hesitant progress," or "slow movement." These alternatives convey a sense of reluctance, hesitation, or disinterest. Depending on the context, any of these antonyms could be used to contrast the sense of determination or eagerness that "chomping bit" typically conveys.