The phrase “narcissistic” is an adjective that describes somebody who’s excessively self-centered and has an inflated sense of self-importance. It can be used to explain somebody who’s useless or obsessive about their look.
The phrase “narcissistic” is derived from the Greek fantasy of Narcissus, a younger man who was so lovely that he fell in love along with his personal reflection. He grew to become so obsessed along with his look that he ultimately wasted away and died.