Don't listen to those other skanks - a space cookie is any baked good with delicious pot in it. Typically a brownie (fudge) or a cookie. Only badasses are allowed to put it in their cereal (milk is allowed).
A space cookie is similar to a space cake, it contains some yummy pot, pollen is a good one to make it with :-) Make them right and cure the munchies at the same time!
Anomalous object that randomly flies by in the Disneyland ride Space Mountain. Looks like a giant cookie. If left unnoticed, it could threaten the safety of earth.
Skiing: A small lump of very hard snow or ice that looks innocent enough but it is practically welded to the piste causing you to stumble when you ski into it. Usually encountered first thing in the morning before the sun has loosened the snow up.