Floog is a connection between two people who share a bond much stronger than "like" or "love". Those who are in floog experience something that the vast majority of people are never lucky enough to have.
Ada and Jay slowly realized that the floog had been there the whole time, just waiting for them to realize it.
It's an adjective used to describe a person or event. Someone is acting cheap, arrogant, self-centered, superior to others, snobbish, or as a jerk, they are a floog. You can also use it as floogish. If an event has the characteristics of a floog than that event is floogish.
That guy who gave me no tip, and was acting arrogant is a fucking floog.