"Got cracking" is an idiomatic expression that means to begin an activity or task quickly and energetically. Antonyms for this phrase could include "procrastinating," "dragging one's feet," "slacking off," or "taking it easy." These words imply a lack of urgency or motivation to get things done. Other antonyms could include "lingering," "delaying," "postponing," or "putting off," all of which suggest a reluctance to start or complete a task. In contrast, words like "diligent," "conscientious," "industrious," and "motivated" represent the opposite of "got cracking," indicating a strong desire to work hard and accomplish goals with great enthusiasm.