"Hot to trot" is a colloquial phrase that implies eagerness or enthusiasm. Antonyms for this phrase can convey the opposite meaning - reluctance or disinterest. Some possible antonyms for "hot to trot" may include terms like "apathetic," "dispassionate," "indifferent," or "lethargic." These words suggest a lack of excitement, motivation, or passion. Another set of antonyms that might work could be "calm," "composed," "collected," or "serene." These words emphasize a sense of tranquility, calmness, or composure, which is the opposite of the agitated or restless state that is often associated with being "hot to trot.