The line of grooves that are cut into the side of highways which cause a loud noise when a driver gets too close to the edge.
by Jesse Hattabaugh May 01, 2006

I've got an STP, my computer got a virus while I was looking at online porn.
Friend: I think my girlfriend's pregnant.
Me: Sounds like you have an STP.
Friend: I think my girlfriend's pregnant.
Me: Sounds like you have an STP.
by Jesse Hattabaugh May 17, 2006
