Bog Stuff is a term used to describe organic material that has been preserved in PEAT bogs. PEAT is a type of soil composed of partially decomposed plant material, which can be found in wetlands and other areas with high moisture content. The term 'Bog Stuff' is often used to refer to the remains of ancient plants and animals that have been preserved in PEAT bogs. The crossword solution for the term 'BOG STUFF' is PEAT, which is a four-letter word meaning a type of soil composed of partially decomposed plant material.