Facebook Friends Forever-
Someone whom you don't really like, but are closely associated with so that you can't defriend them on facebook.
1. Annoying Uncle- Pain in the ass at parties, but friended you online- now he's your FBFF!
2. Asshole friend from High School- turned into an asshat after graduation, but writes on your wall- your FBFF!
3. Clingy ex- still wants to be "friends"- FBFF!