Codpiece

A codpiece (from Middle English cod 'scrotum') is a triangular piece that attached to the front of men's hose, covering the fly. It may be held in place by ties or buttons. It was an important fashion item of European clothing during the 15th–16th centuries, in the 16th century becoming a firm upwards-pointing projection based on a stiff material such as boiled leather, or in plate armour, steel.

In the modern era, similar clothing pieces are worn in the leather subculture, and in performance costumes, such as for rock and metal musicians. A similar device with rigid construction, an athletic cup, is used as protective gear for male athletes.