Zig and Zag, in skiing, is a term used to describe the technique of SLALOM skiing. SLALOM skiing involves navigating between poles or gates that are spaced at different distances from each other. The skier must make quick turns, zig-zagging between the poles, in order to complete the course. This technique requires a great deal of skill and agility, as the skier must be able to quickly change direction while maintaining balance and control.