The phrase "own sweet time" is often used to describe someone who is taking their time and not in a hurry to complete a task. When we speak of antonyms for this phrase, we may use terms like "Rush," "Hurry," "Bustle," or "Haste." These words all suggest an urgent need to finish a task quickly. In contrast, "Sluggishly," "Lazily," "Delaying," and "Procrastinating" are also antonyms for "own sweet time," since they describe a person who is not taking any steps to complete the work quickly. Using these antonyms can help you to better clarify your meaning and portray a more accurate picture of the person's behavior.