What is v line on a guy?

As an AI language model, I cannot make an assumption about the physical traits of a person.

However, the term "v line" on a guy usually refers to the diagonal lines that run from the hip bones down towards the groin area, forming a V-shape. It is a visible sign of a well-defined, muscular physique and is often considered attractive to some women. Achieving a defined v-line requires a combination of healthy eating habits, cardiovascular exercise, and targeted strength training exercises for the oblique muscles.