Do I really want to know?
Why, I'm glad you asked! :) Sampo was an undefined Deus ex Machina from the Finnish poem "Kalevala" which appeared in the MSTYfied movie adaptation of the same The Day The Earth Froze, aka Sampo. Since the film version never bothered to tell us what sampo is, this led to the following debate on the nature of sampo:
*From 422 "The Day the Earth Froze": List of things Joel and the 'bots think a sampo might be:
Tom: A small taste of no-fat cheese at the grocery store.
Crow: A really good can-opener.
Tom: A strapless evening gown.
Joel: A hand-hammered conch belt with turquoise inlays used to accentuate an oversized blouse.
Crow: That dent between the nose and the lip.
Tom: Some sort of wrinkle cream.
Joel: A progressive new corporation with an eye towards the future. Sampo is a corporation for people by people.
Crow: Increases corn yields.
Tom: A nasty little rubber novelty item.
Crow: Something not tangible that's found in the laughter of children, roar of the tide, or the capacity to love and be loved.
Joel: A new, high energy prop comic.
Tom: Whatever it is, the U.S.A. still makes the best ones.
Crow: An exciting new fragrance by Prince Macciabelli.