Slip Knit Pass (SKP)
SKP is a 1-stitch decrease that leans to the left.
Step 1: Slip 1 knitwise with yarn in back (wyib).
Step 2: Knit 1 stitch.
Step 3: Insert the left-hand needle into the slipped stitch, pull the slipped stitch over the k1, and let it drop over the tip of the right-hand needle.
Use the tip of a double pointed needle to readjust and neaten each skp along the decrease line as needed.