A term describing grungy persons that have nothing better to do, then loiter for hours a day everyday. ie the mall, a downtown strip, or old parks. Most Local Dirts are pothead wiggers who think they are king shit of the world.
Local Dirt can also be abreviated as L.D.
Bob: "Let's go hang out downtown"
Lisa: "No there is too much Local Dirt there"
Joe: "Did you see that pack of L.D we just passed"