Sexy: Supposed to mean sexually attractive, however recently it has become a word of ambiguous meaning that morons use when unable to think of a better adjective for something they like. Pretty: 1. A girl who has physical appeals that attracts a guy. A girl can also be pretty inside in her feelings in her beliefs. Beautiful: Beautiful is a woman who has a distinctive personality, one who can laugh at anything, including themselves, who is especially kind and caring to others.