Skudder bottom, also known as skid mark, is a term used to describe a mark left behind by a car when it skids. Skudd bottoms are noticeable on roads in the midst of icy conditions, including heavy rain or snow. The skid marks function as signs of likely skidding or lack of traction and should be handled carefully. Motorists are cautioned to reduce their speed and keep up a safe distance from skudder bottoms to prevent any potential accidents. Stay safe on the roads!