wool - n - gather

Skip is not a very common term in knitting since all the stitches are live and will unravel if not worked. Having done some digging, the only thing I can come up with is when picking up stitches along the row side you might have to skip some stitches to ensure the picked up stitches don't pucker or pull. Normally you would pick up and knit 3, skip 1, and repeat. Otherwise, this abbreviation could be a substitute for a slip stitch.