Biding time, which means to wait patiently for the right moment to act, has several antonyms. One of them is impatience, which is a feeling of restlessness and irritation when things are not happening quickly enough. Another antonym is haste, which entails rushing or doing something quickly without proper scrutiny or planning. Procrastination is also an antonym of biding time, which means delaying or putting off a task or decision for later. Finally, recklessness is another antonym for biding time, where one takes unnecessary and dangerous risks without considering the consequences. In short, impatience, haste, procrastination, and recklessness are antonyms of biding time.