Slipknot loops, also known as nooses, are a type of knot used to form a loop. They are typically used in rope work and can be tied in the end of a rope to form a secure loop. Slipknot loops are often used in climbing, sailing, and other outdoor activities. They are also used in some medical procedures, such as tying off a vein or artery. Slipknot loops are easy to tie and untie, making them a popular choice for many applications.