1. You have been "pruned" from a "facebook," leading to the compound word prunefaced.
2. Upon discovery of the event, you are likely to make a decidedly unattractive and very scrunched-up face, which expresses both your scorn and distaste at having been cast aside.
"I got all kinds of prunefaced in 2011, but you know what? I don't miss any of those losers now. True story."
"That girl got so prunefaced, nobody was talking to her. Her chat windows were 100% empty, she had to call people to apologize over the PHONE. LIKE IT WAS THE 1990s!"