You purl 2 sts. Then, instead of knitting the next stitch on your left needle, you skip it and knit the one on the other side of it. Make sure that when you pull the yarn through the stitch, you don't grab the yarn from the first stitch by accident. Once you pull the yarn through the stitch, you won't be able to drop the stitch off the left needle like you normally would. It's going to feel funny, but after you do that, knit into the first stitch on the left needle like you normally would. Now you can drop both the stitches you knit off your left needle.
P 2, *K 2nd st on left hand Needle then K the first st, drop both sts from left hand Needle, P 2 .....