slipped overhand knot.
slip knot (Wikipedia)
The slip knot is a stopper knot which is easily undone by pulling the tail (working end). The slip knot is related to the running knot, which will release when the standing end is pulled. Both knots are identical and are composed of a slipped overhand knot, where a bight allows the knot to be released by pulling on an end; the working end for a slip knot, and the standing end for a running knot. The slip knot is used as a starting point for crochet and knitting.
| Slip knot | |
|---|---|
 A slip knot tied in a kernmantle rope | |
| Names | Slip knot, Slipped overhand knot |
| Category | Stopper |
| Related | overhand knot, noose knot, running knot |
| Releasing | Non-jamming |
| Typical use | temporary stopper knot, knitting, animal snares |
| ABoK | 529 |
The slip knot is a stopper knot that may be spilled or slipped instantly by pulling on the end to withdraw a loop. There is but one knot entitled to the name; any others having a similar feature are merely "slipped" knots.