What is what does it mean to dutch oven someone?

Dutch ovening someone, in the crude slang sense, refers to the act of pulling the bed covers over someone's head, trapping them inside what is effectively a sealed environment filled with the individual's own farts. The term implies a joke, prank or act of playful hazing. The goal is to subject the person inside to the unpleasant odor. It's often used in a lighthearted, albeit somewhat immature, manner.