Used to define the amount or lack of friction, traction or stiction of a surface, or anything acting upon a surface. Usually used in conjuntion with poor grammar.
"Man, this road is slick...I ain't got no gripshum"
"My shoes are a little worn-out, they ain't got the gripshum"
Customer to clerk when shopping for a set of tires to replace an old set, simply: "Got the gripshum?"