Slip-knotted loops, also known as nooses, are a type of knot used to form a loop in a rope or cord. The knot is tied by passing the end of the rope through the loop and then slipping it back over itself. This type of knot is often used in sailing, fishing, and other outdoor activities. It is also used in some medical procedures, such as tying off a vein or artery. Slip-knotted loops are strong and secure, making them an ideal choice for many applications.