to destroy or reduce the pleasure, interest, or beauty of something

它的本意是指“破坏、糟蹋、毁掉原本的乐趣兴致等等”，在涉及电影方面时可以理解为“剧透”。

He tried not to let the bad news spoil his evening.

他努力不让那个坏消息破坏他晚上的兴致。

I haven't seen the film, so don't spoil it for me by telling me what happens.

我还没看那部电影，所以别把剧情剧透给我。