A word on urban dictionary that no one has ever used except them. Can usually be defined by a quick google search to check if one of the top three results is the words urbandictionary.com page.
Individuals who have anyone they've ever met in their entire lives added as friends on their Facebook account, particularily members of the opposite sex.
"Did you see Bob's friends list on Facebook? He has like 700 friends. Wow, he's such a faceslut!"