the world > relative properties > wholeness > mutual relation of parts to whole > fastening > binding or tying > a bond, tie, or fastening > [noun] > knot > insecure knot (4)
a granny knot or similar inexpertly tied knot.
a reef knot with the ends crossed the wrong way (and therefore liable to slip); an inexpertly tied knot.
Short for granny knot n. at compounds 2.