Skudder bottom, often called skid mark, is a term used to characterize a smudge left behind by a car while sliding. Skuddderbutts are visible on roads during icy conditions, like heavy rain or snow. These marks function as indicators to likely skidding or lack of traction and must be treated with care. Motorists are cautioned to reduce their speed and keep up a safe distance from skuddder bottoms to steer clear of any potential collisions. Stay safe on the roads!