Someone who likes to announce everything in their life on facebook to get people to feel sorry for them/react. Usually grossly exaggerated but can also be completely fictitious in order for people to respond as they don't have a life/friends.
The usual response if you ask them to stay out of your life is your a jealous bitch (and usually retards that can't spell) followed by some sort of tragic life story.
These kind of people like to constantly test their relationship/friendships to feel wanted.
Sane person: "can you please stop bitching about me and leave me alone?"
Attention seeker goes on facebook "OMG what a jelous bich! So bang out of order! Someone needs to sort her out..."
Sane person: wtf?
Attention seeker "I have just had it up the ass wid my sexy bf!"
Sane person "How classy dear"
Attention seeker "my bf wont lick my fanny! help"
Sane person: "Maybe you should sort your stinky hairy cunt out?"