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grief knot
A grief knot (also what knot) is a knot which combines the features of a granny knot and a thief knot, producing a result which is not generally useful for working purposes. Its name is an example of a portmanteau, from ''granny'' and ''thief''.
The grief knot resembles the granny knot, but tied so that the working ends come out diagonally from each other, whereas a granny knot's ends both come out on the same side. It unravels rather elegantly: as tension is applied, the ropes rotate like little cogs, each one twisting to feed the rope through the knot.
==Tying==
To tie the grief knot, tie a single "overhand knot" (nb: this isn't the same as a single-strand "overhand knot" often used as a stopper or as a component of other knots, such as the fisherman's knot or ring water knot), as if starting a reef knot. Then thrust the two free ends together down through the center of the just-tied overhand knot. Twist the free ends to form half hitches to lock, twist the other way for the granny knot-like configuration that rolls apart when the standing parts are pulled. In short, if the standing parts (the "main lines" which bear force into the knot) nip/cross their own ends, the knot will lock; otherwise, it will probably slip.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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