That correctol I slipped into grandpa's prune juice was just what the docta ordered for greasing the skids! Now he has skid marks that could make all the residents of Shartlesville envioius.
The mark left by a penis, when extracted from an anus and placed back into underwear. Brown/Dark green fecal matter inside the front of a man’s underwear. Usually 2' inches in length with a potent smell.
After me and Marilyn made love i came across a suspicious mark in the front of my underwear I came to the conclusion it was front skids.