Dictionary
trick' or treat'
a children's Halloween custom, in which they call on neighbors, using this phrase, and threaten to play a trick if a treat is not given.
trick-or-treat
Pronunciation: (trik'ur-trēt'), [key]—
v.i.
to become involved or take part in trick or treat.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.