When the door opens they call out,"Trick or treat."是什么意思

问题描述:

When the door opens they call out,"Trick or treat."是什么意思
谢谢各位哥哥姐姐了`````
要多少分说`````

trick or treat
ph.
1."不请吃就捣蛋"(指万圣节孩子们挨家逐户要糖果等礼物,如不遂愿便恶作剧一番的风俗.)