When you just put any thing on it.
Girl I Christmas-Treed that Art Quiz
To fill in a test bubbling the answers randomly, like placing christmas bulbs on a tree, to guess because you don't know the answer or are to lazy to do it right.
I just christmas-treed the final exam because I always cut class and didn't know anything.
Loading a shot gun with buckshot, slug, buckshot, slug
There is nothing better for home defense than a Christmas-treed shotgun.