| trick or treat | |
| —sentence substitute | |
| chiefly (US), (Canadian) the cry by children at Halloween when they call at houses, indicating that they want a present or money or else they will play a trick on the householder | |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a chattering or flighty, light-headed person. |