The word "nononsense" implies that someone is serious, direct, and straightforward in their approach. Antonyms for this word could include terms such as "frivolous," "distracted," or "unfocused." While someone who is nononsense stays on-task and avoids wasting time, a frivolous individual may waste time on unimportant matters instead of tackling important tasks. Similarly, someone who is distracted lacks the focus necessary to get things done, while an individual who is unfocused may lack the clarity of purpose necessary to complete tasks efficiently. In all cases, the antonyms for nononsense suggest a lack of seriousness or objective focus, which can negatively impact productivity and success.