A "silicone bodysuit" in the context of a porn video tag refers to a tight-fitting, full-body outfit made from silicone material. This type of suit may be used for various purposes such as enhancing or altering the appearance of the wearer's body, providing a smoother surface for filming, or adding an element of kinkiness to a scene. The suit can create the illusion of increased body size and contours, often making the wearer appear more voluptuous or muscular than they might naturally be. It is important to note that this tag refers specifically to the silicone material used in the bodysuit, which is distinguished from similar items made of other materials like latex or spandex.