How would you describe slip knot?

If you mean a regular slip knot, I can help. You start out by looping a strand of yarn around your finger. Then,you slip it off, keeping the loop intact. You take string from the yarn on the right side of the loop and lay it across the loop. Pull it through the loop, closing it. The yarn should be poking out, and should closely resemble a noose. And then, you're done. As a cautionary note, I would like to add that if you pull on either side of the knot at once, then the knot will slip apart, hence the name 'slip knot.' So, be careful!