skidmark

Short definition from Wiktionary

Noun

1. 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. 2
   Any other mark or stain caused by one surface skidding along another.
3. 3
   A visible feces stain left on underpants, trousers, or sometimes the toilet bowl.