"dope fiend" does not mean a pothead. Weed is only called dope by those who have never done any drugs, and a fiend is someone hopelessly addicted to a substance so much that they would suck a strangers dick for it.
a person who is addicted to facebook and has intense urges to update their status,post notes,and to send you 'pieces of flair' every chance they get. They define their social value by how many responses and or 'pieces of fucking flair' they receive back.
Zack is such a Facebook Fiend . He changes his stats every ten seconds!
Damn it Audrey, you sent me sixteen bumper stickers today alone! I don't even have that application!