N-UNCOUNT 不给糖果就捣蛋(万圣节前夜孩子们敲门索要糖果等时说的话) Trick or treat is an activity in which children knock on the doors of houses at Halloween and shout 'trick or treat'. If the person who answers the door does not give the children a treat, such as sweets or candy, they play a trick on him or her. 不给糖果就捣蛋(万圣节前夜孩子们敲门索要糖果等时说的话)