What is "skid mark"

alt. 1 A long black mark left on a road surface from the sliding or skidding tires of a motor vehicle that has lost traction. 2 Any other mark or stain left on a surface from a sliding or rubbing object. 3 (context colloquial humorous euphemistic English) A visible feces stain left on underpants, trousers, or sometimes the toilet bowl ; the mark of a soiled finger wiped on a surface. 4 Any burn on the skin caused by scraping the skin against a surface. n. 1 A long black mark left on a road surface from the sliding or skidding tires of a motor vehicle that has lost traction. 2 Any other mark or stain left on a surface from a sliding or rubbing object. 3 (context colloquial humorous euphemistic English) A visible feces stain left on underpants, trousers, or sometimes the toilet bowl ; the mark of a soiled finger wiped on a surface. 4 Any burn on the skin caused by scraping the skin against a surface.

A skid mark is the visible mark left by any solid which moves against another, and is an important aspect of trace evidence analysis in forensic science and forensic engineering. Skid marks caused by tires on roads occur when a vehicle wheel stops rolling and slides or spins on the surface of the road. Skid marks can be analyzed to find the maximum and minimum vehicle speed prior to an impact or incident. Skidding can also occur on black ice or diesel deposits on the road and may not leave a mark at all.