Why do children say,"Trick or treat."?

Question

Ladies & Gentlemen,

Why do children say,Trick or treat,smell my feet,give me something good to eat?"

Because,my girlfriend usually says that to me when we're at the Halloween dance party. What does she mean by that?

Answer 1

Trick or Treat, also known as Guising, is an activity for children on Hallowe'en, in which they are dressed up in costumes, often of supposedly malevolent supernatural beings such as ghosts, demons, or witches, and proceed from house to house, asking for sweets with the phrase "trick-or-treat?" with the implied threat that, if their demands for confectionery are not met, they will perform some "trickery".