knit
Slip, slip, knit (ssk) is a common form of decreasing in knitting. It leans to the left, while the knit 2 together (k2tog) decrease leans to the right. Designers will specify which decrease to use, since the different directions can be design elements in the pattern.
Step 1
Slip the next stitch knitwise to the right needle.
Step 2
Slip the next stitch knitwise to the right needle. You now have two unworked stitches on your right needle.
Step 3
Insert the point of the left needle through the front of both unworked stitches.
Step 4
Knit these two stitches together through the back loop.