Narcissism Ratio
The ratio of photos of yourself you've added in Facebook to those added by others. Mitigating considerations may include Korean Tourist Disorder, which compels one to take pictures of oneself in front of every landmark encountered regardless of its insignificance.
Dick: Jane is such a self-centered bitch. She has like 700 photos of herself tagged.
Dave: Srsly. Her narcissism ratio is off the charts.
Dave: Srsly. Her narcissism ratio is off the charts.