yo-yo skiing
n.β Β«Last night, the bus driver asked us where we lived, which led to a lively conversation about skiing, his many ski visits to Snowmass (which he enjoyed), his condo at Snowbird in Utah and what he referred to as βyo-yo skiingβ in Minnesota, where the hills are not very big and skiers have to go up and down constantly.Β» ββConventional wisdom” by Frieda Wallison Aspen Times (Colorado) Sept. 2, 2008. (source: Double-Tongued Dictionary)