Lip V, specifically referring to the "V" shape of the upper lip, is often referred to as a Cupid's bow.
The term "Cupid's bow" describes the double-curved shape of the upper lip, resembling the bow of Cupid, the Roman god of love. The central portion of the upper lip forms an "inverted V-shape" or a depression pointing downwards. This shape is considered an attractive feature in many cultures.
