Skudderbutt, commonly referred to as skid mark, is a term used to describe a spot left behind by a car during skidding. Skuddderbutts are visible on highways during icy situations, including heavy rain or snow. The skid marks function as indicators to likely skidding or lack of traction and must be treated with care. Motorists are advised to lower their speed and keep up a safe distance from skuddder bottoms to prevent any potential collisions. Stay safe on the roads!