Take a piece of butcher’s twine and snuggle it underneath the pope’s nose, like a sling. The pope’s nose, or pygostyle, is the protruding fleshy "tab" at the posterior end of a chicken between the legs. Some people think that is the neck.(They're very wrong). Cross the twine OVER both leg joints.
Reverse direction and slide the twine UNDERNEATH both leg joints, creating a wrap - a figure eight surrounding the legs.
Slip the twine UNDER the chicken breast and pull back. When you pull, the legs should pull together and towards the breast side in a tidy package.
Pull the twine towards the back of the chicken while at the same time you use your thumbs to pull the breast skin down towards the cavity. Make sure the skin is smooth and taut and that the twine is going OVER the wings, holding them against the side of the bird.
While holding the twine firmly in place, make a simple slip not to tighten.
Use a butcher's knot to keep the trussed bird together. Trim any unused twine.