Skier is a skill that can be given to a lemming in Lemmings 2: The Tribes. A Skier puts on skis and uses a pair of ski poles to propel itself forward, moving faster than a walker. The lemming will accelerate if it travels down a slope, and if traveling fast enough it will ramp up off small slopes. It will slow down as it moves up a slope, and if it slows down too much it will stop and revert to a walker. A Skier will also stop if it is given another skill (other than a permanent skill or exploder), falls too far causing it to splat, or gets caught in a knockback explosion. On flat terrain, the Skier behaves similarly to a Roller.
The Skier is one of the rarest skills in Lemmings 2: The Tribes key to solving only one level in the Polar Tribe: