trick or treat

US /trɪk ɔr triːt/
UK /trɪk ɔr triːt/
"trick or treat" picture
1.

des bonbons ou un sort, farce ou friandise

a Halloween custom in which children in costume visit houses and ask for treats, threatening to play tricks if they do not get them

:
The children went from door to door, shouting "Trick or treat!"
Les enfants allaient de porte en porte, criant « Des bonbons ou un sort ! »
Every Halloween, my kids love to go trick or treating.
Chaque Halloween, mes enfants adorent faire du « des bonbons ou un sort ».