Page 354 - Geoffrey Budworth, Jason Dalton "The Little Book of Incredibly Useful Knots"

Slipped figure eight

This stopper knot is slightly bulkier than a simple overhand or thumb knot; and, although it

will not block a bigger hole, the quick-release drawloop makes it easier to undo.

Outline an ampersand [&] with the working end, going first over and then under its own standing
part; alternatively, impart a twist to achieve the same shape (1). Then tuck a bight through the
upper loop from front to back (2, 3). Pull on both ends and on the loop to tighten the knot (4).