chicken-winging
n.— «I get up these routes with little difficulty and practice the rock-climbing techniques of stemming, jamming, crack climbing and chimneying. I even do a technique called chicken-winging, where I press my elbow and palm against two sides of the rock and pull up.» —“Joshua Tree rocks” by Laura Casey Mercury News (San Jose, California) Jan. 20, 2008. (source: Double-Tongued Dictionary)