Complex sentence: The horse stops and the roper ties three of the steer's legs together with a "pigging string" using a half-hitch knot, colloquially called "two wraps and a hooey".
Split into simpler sentences: The horse stops and the roper ties three of the steer's legs together with a "pigging string" using a half-hitch knot. The traditional tie is called "two wraps and a hooey".