trick or treat
US /trɪk ɔr triːt/
UK /trɪk ɔr triːt/

1.
不给糖就捣蛋
a Halloween custom in which children in costume visit houses and ask for treats, threatening to play tricks if they do not get them
:
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The children went from door to door, shouting "Trick or treat!"
孩子们挨家挨户地喊着“不给糖就捣蛋!”
•
Every Halloween, my kids love to go trick or treating.
每年万圣节,我的孩子们都喜欢去不给糖就捣蛋。