If they say 'Inbox me!' or something like that they mean they want you to add them as a friend on facebook.
What you said
It means you can chat to people on Facebook who are your friends and are online when you are.
blackberry messanger
I don't know what you mean but I think you mean when you get an e-mail from facebook. Anyway I think it just says your friend has a birthday today or someone poked you and then it has the facebook logo so there are many things facebook emails you about. Hope this helped.
happy shout
myspace, facebook, team jonas, fanfamily, or their fanmail.
Explain, utter, or babble. Those word mean shout out.
to yell or shout
shout
To shout at somebody
I shout.
To shout or yell
shout enough
to scream or shout
uio.
I think it's just a random shout that doesn't mean anything, sounds epic though.