A word commonly heard when being asked if someone wants to play the game "Screw, Kill, Marry"
When you're tapping a girl from behind and her face hits the wall, leaving a scuff mark similiar to those found on the Schuylkill Expressway.
Check out those three girls over there, schuylkill mary?
So I was doing this girl doggystyle and her face hit the wall. Left a big black mark, man do I love a good Schuylkill Mary!