Fisherman's knot
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The fisherman's knot is a bend with a symmetrical structure consisting of two overhand knots, each tied around the standing part of the other. Other names for the fisherman's knot include: angler's knot, English knot, halibut knot, waterman's... Wikipedia
ABoK: #293, #1414
Names: Fisherman's knot, Waterman's knot, Angler's knot, Englishman's knot
Origin: Ancient
Typical use: Joining thin, stiff, or slippery lines