Facebook Whoring
You're a Facebook whore if you're in 30 groups and still don't know what any of them are about.
"I'm in this group called 'People Who Like Cats and Don't Know Why.'", said by someone who joined it because it had 500 members.
"I joined this group because it had a cool picture.", said by someone who joined it 2 days ago.
"I'm in a group called 'People Who Think They're Smart.'", said by someone who doesn't know what smart means.