Etymology:Middle English, from Anglo-French scinn pope, from Latin puppis skinn
1.)As in pudding, loose stools will get a skin covering over them if left to sit. Used mostly flavor food dishes such as beef stew and other beef related recipes.
2.) Something to say in time of surprise.
Once we added the poopy skins to the stew, the flavor came right out.
Poopy skins! That scared the hell out of me.