What is shed a half a yard?

Give me $50.00. this line was used in one of the opening scenes of "to live and die in la" when someone in the bar yells out to one of the party:"petivich shed a half a yard!" (Contribute $50.00 towards the beer tab) this line is a nod to gerald petivich. Author of the pulp novel "to live and die in la".the novel upon which the movie is based.