To do something at the wrong time or in an inappropriate season; out of season; ill-timed.
他现在才提出这个计划，简直是冬箑夏裘，完全不合时宜。
He brought up this plan only now, which is completely like a winter fan and summer fur coat, utterly ill-timed.
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To do something at the wrong time or in an inappropriate season; out of season; ill-timed.