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Slipped Constrictor Knot
The basic constrictor knot is a semi-permanent binding which, when tightened, can often be removed only by cutting it off. Incorporating a draw loop (by feeding in a bight instead of the working end) provides a quick release for applications where only a temporary seizing is required.
 
First, create a constrictor knot: make a complete round turn around the object, then cross the working end over in a second round turn, on the opposite side from the first (1 ).

 Bring the working end to the front of the knot and feed it beneath both loops between the object and the line (2).

 Then bend the end back in a bight (3) and retrace its initial pathway, going under two knot parts. Tighten the knot by pulling on both standing parts, but not the working end (4).