The term "bushy-tailed" typically refers to someone who is enthusiastic, alert and energetic. Therefore, antonyms for "bushy-tailed" might include lethargic, sluggish, unmotivated, tired, dull or apathetic. These terms generally describe individuals who lack energy, enthusiasm, or a zest for life. People who are not bushy-tailed are often less motivated, less productive, and inclined to procrastinate. Conversely, those who are bushy-tailed are more likely to be productive, creative, and driven. In short, antonyms for bushy-tailed refer to individuals who do not exhibit the same enthusiasm, energy and vitality as those who are bushy-tailed.