the.com/windsor knot

means A wide, triangular, highly symmetrical way of tying a necktie, made by wrapping the wide end around twice before threading it through — favored when you want your knot to look deliberate and substantial.

from Named for the Duke of Windsor, who supposedly favored a broad, deliberate knot — though the popular story overreaches: he actually just wore thick ties that made ordinary knots look bigger, and the elaborate double-wrap knot that bears his name was devised afterward by others trying to imitate the look. So the knot is less 'his technique' and more 'his reputation, formalized by tailors.'