Psychologist Dr. Michael Fenichel, who has published numerous writings on FAD online, describes it as a situation in which Facebook usage “overtakes” daily activities like waking up, getting dressed, using the telephone, or checking e-mail.

“The amazing thing is that, like cellphones, nobody seems to notice the vast amount of time and energy – at work, at home, and now while on the move – people are devoting to Facebook. It has become a given,” Fenichel writes in an online post titled “Facebook Addiction Disorder- A New Challenge?”

FAD could be classified under the more broad “internet addiction disorder” or internet overuse.