slip 1 stitch with yarn in back
Sl1wyib is a really simple stitch to pick up. It simply means, slip 1 stitch with yarn in back.
To do this, imagine your knitting through a row. Your working yarn is already at the back of your work so all you need to do is slip 1 stitch from your left needle to your right needle, by inserting your right needle from right to left into the first stitch on your left needle.
Now you can continue knitting as usual.