What exactly is a narcissist?

someone that likes : Someone that likes themselves more than they like anyone else.

A personality type: Narcissism refers to self-importance, feelings of superiority, and self-centeredness. Everyone has narcissistic qualities. When they are extreme and dominate the entire personality, a mental health professional might diagnose "narcissistic personality disorder." often, the feelings of grandiosity and superiority mask underlying, hidden feelings of inadequacy.

Narcissism: The hallmark of a narcissist is an immense ego, grandiosity, and self-importance, as well as being entitled, and a tendency to use and objectify others as well as thinking of people in all-good or all-bad terms instead of shades of gray. The core of a narcissist is profound insecurity.