Narcissist

Jack was first called out by u/-KitchenVisit- on his Subreddit who said he was narcissist, and started a trend among the community.

Narcissistic personality disorder is a mental health condition in which people have an unreasonably high sense of their own importance. They need and seek too much attention and want people to admire them. People with this disorder may lack the ability to understand or care about the feelings of others. (https://www.mayoclinic.org/)

This is the jack motto for narcissism: Jack = Narcissim.

Side note: We hold no grudge against the person who accused Jack of this he had a bad day and was taking out some anger he later apologized.