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非常出色的人（或事物）;令人兴奋的人（或事物）
If you describe someone or something as a humdinger, you mean that they are very impressive, exciting, or enjoyable.
例句
It should be a humdinger of a match...
这应该是一场非常精彩的比赛。
His latest novel is a humdinger.
他最新的一部小说棒极了。