The phrase "most suntan" is used to describe a person who has been exposed to a lot of sun and has developed a dark brown or bronze skin color. There are several alternative expressions that can be used to describe this same appearance. One possibility is "deeply tanned," which suggests that the person's skin has absorbed a significant amount of ultraviolet radiation. Another option is "bronzed," which emphasizes the rich, warm color of the skin. "Darkly tanned" is a more descriptive term that also conveys the person's exposure to the sun. Other synonyms for "most suntan" include "golden brown," "coppery," and "browned".