A term originating in the South... To "trick-or-treat" is to
spoil and spend money on a female, whether it is taking her out to dinner, taking her shopping, or anything else of that sort.
Think of it as... treating
the trick out.
Of course, the average male would never "trick-or-treat," due to ego or pride. A female would have to earn the right to have the male "trick-or-treat."