twuncing
n.— «The growing practice—known as twuncing (two [or more] walkers using non-essential cars)—involves walkers driving two cars to the end point of their walk, and then riding together in one car to the starting point. After the walk they drive together to the starting point to collect the other vehicle.» —“Twuncers take to the Bank Holiday roads” by Rhodri Clark icWales (United Kingdom) Mar. 22, 2008. (source: Double-Tongued Dictionary)