Antonyms for the phrase "rarin' to go" depict a state of being lethargic, indolent, or disinterested. These words include apathetic, lethargic, sluggish, inactive, and lazy. A person who is apathetic lacks emotion or enthusiasm and is indifferent to the situation. Lethargic refers to a state of sluggishness or laziness, and the person might have no energy to perform any task. Sluggish and inactive are synonyms emphasizing the same state of not being enthusiastic or energetic. Lazy depicts a person who lacks the intention or desire to act, and they might be disinclined to perform any activity. In summary, these antonyms for "rarin' to go" suggest a state of not being eager and motivated.