A condition - generally found in, but not limited to, suburban teenagers - under which, afflicted persons deprive themselves of sleep in favor of repeatedly refreshing ones Facebook 'News Feed' in hopes and/or anticipation of a new 'Status Update' or 'Wall Post' from ones friends.
David: Jesus Christ! Becky, you look like shit.
Becky: Yeah I had a killer case of Facebook insomnia, didn't get to bed til 6 AM
David: Get a life, Becky.