1. A mark of poop. Usually on the undergarments from an incomplete wipe.
2. To stain something with poop whether intentional or unintentional.
3. A smear of poop across a surface.
1. While Sarah was hiking though the woods she knew that her underwear would have a poop stain after the walk...should have wiped one more time.
2. Brett borrowed my boxers and left a poop stain, what a waste.