" Don't be a spoilsport, Arthur! " boomed Ludo Bagman, rattling his pockets excitedly.

“不要扫兴嘛，亚瑟！”卢多·巴格曼粗声大气地说，一边兴奋地把口袋里得叮当乱响。

When the spoilsport ruins the fun, he always does so by refusing to play by the rules.

有些扫兴人会使游戏变得索然无味、毫无趣可言，往往是因为不遵循游戏规则。

You wouldn't want to get a reputation for being a spoilsport, would you?

你不想得到一个扫兴名声，是吗？

Nathan is telling Bethany that if she leaves now, she'll get the reputation for being a spoilsport.

Nathan 告诉 Bethany， 如果现在，会得到扫兴名声。

Oh, go home, William, if you're going to be such a spoilsport. -All right, I will.

你非要这么扫兴，还是回家吧，威廉。-好，回就回。

Oh, go home, William. If you're gonna be such a spoilsport...

威廉 你要还这么扫兴 就回家。

Someone who isn't interested in doing fun things, especially someone who wants to do everything properly, that doesn't want to break any of the rules, that's what a spoilsport is.

一个对做有趣事情不感兴趣人，尤其是那些想把每件事都做好人，不想违反任何规则人，这就是一个破坏运动。

Here what Bethany means is that she would rather have the reputation for being a spoilsport than being the kind of person who keeps drinking as the night goes on – at least, I think that's what she means.

Bethany 在这里意思是，宁愿拥有嗜酒成性名声，也不愿成为那种夜不能寐人——至少，我认为是这个意思。