bumping
n.— «The indictments of 50 adults last month stemmed from an undercover infiltration of a sophisticated dogfighting ring that planned fights six to eight weeks in advance. But the crime is more commonly found here among kids or young adults who spontaneously engage in the activity—referred to as “bumping”—on street corners, in parks or near school grounds, Smith said.» —“Dogfighting ‘on the rise’ with Harris County youths” by Peggy O’Hare Houston Chronicle (Texas) Dec. 1, 2008. (source: Double-Tongued Dictionary)