Question: I don't want to share my PAGE, but I want to share a message with a short URL link to something.

Answer: 
I guess you're talking about this, right?

> 
> <http://www.facebook.com/sharer.php?u=http%3A%2F%2Fwww.google.com%2F&t=Google>
> 
> 
> 

It will let you share "www.google.com" on Facebook using the title "Google". All encoded, obviously.
Here's a very easy way to do it: <http://www.facebook.com/facebook-widgets/share.php>