AHD says it’s “wedeling”, from the verb “wedel”, a back-formation of “wedeln":"A snow skiing style in which the skier executes a series of short quick parallel turns by moving the backs of the skis from side to side at a constant speed.” Etymology: “German, from wedeln, to wag the tail, fan, from Middle High German wadelen, wedelen, from wadel, wedel, fan, tuft of hair, from Old High German wadal, wedil. “
