Chomping the bit is a phrase used to describe someone who is eager and impatient to start something. The concept of antonyms for this phrase is a bit tricky as it is the exact opposite of what the phrase conveys. However, some antonyms that come close would be feeling indifferent, disinterested, or apathetic about starting something new. These words portray a lack of enthusiasm or eagerness to start, unlike the usual eagerness and enthusiasm embraced in chomping the bit phrase. Hence, if one says they are chomping the bit to start a new project, others who feel indifferent may respond with expressions like "no rush," "take your time" or "I'm not in a hurry.