Lanyard (noun)

1. A cord, rope, or strap, worn around the neck, shoulder, or wrist, to carry an object, such as a knife, whistle, or key.
2. A cord or string that is used to attach a badge, key, or other small object to clothing or a bag.

Origin:

Early 17th century: from french laniere, literally "strap", from lanière, from lanier "wool carder", of uncertain origin.

Examples:

1. I wore a lanyard around my neck to keep my ID card easily accessible.
2. Many people wear lanyard with the name of their company, school or organization.
3. The lanyard on the soldier's shoulder held his identification tags.
4. The lifeguard wore a whistle on a lanyard around his neck.
5. The convention goers were given lanyards with their badge attached to it.