What knot? The Whatknot of course. (ABOK #1208 et al)
1208. THE WHATKNOT. This is the same knot formation as the GRANNY KNOT, but the ends are diagonally opposite each other. It is hardly a practical knot. But with the ends seized it is also called the REEVING LINE BEND (#1459), and it also servers as an interesting trick (#2579)