dirt tracking
n.β Β«Ten minutes after the final whistle, the substitutes came out to run around and get the blood pumping; dirt tracking, as it is known. The bench boys have adrenalin coursing through their veins but it has not had an outlet.Β» ββEngland have to win war against South Africa” by Will Greenwood Telegraph (United Kingdom) Sept. 14, 2007. (source: Double-Tongued Dictionary)