oil spotted
v.— «For us roadies, truck stops provide a place to frolic, shop and occasionally get left behind. Being left behind is called “oil spotted” in roadie speak. No one truly knows the origin of the term but evidence does indicate that it may have evolved from the statement “the only thing I could find was the oil spot where the bus used to be.” To avoid oil spotation, it generally a good idea for roadies to leave a note on the drivers seat if they leave the bus.» —by Dave Rat Roadies in the Midst—Touring with the Red Hot Chili Peppers Aug. 24, 2006. (source: Double-Tongued Dictionary)