A "bonding" exercise in the form of a
physical activity wherein participants form either a conga line or circle, bend over whilst naked (from at least the waste down), place their head against the buttocks of the person in front, grasp his penis with one hand, thence proceed to move forward, typically at increasing pace until the line is broken
Of course, such activity is usually frowned upon by
authorities and, as such, may normally only be proceeded with at such gatherings as Rugby (Union) teams at English public boarding schools