Facebook Like: Post Content Instead of Title?

In my wordpress blog, I let users posts their own content with TDO Forms. I have taken away the title though, and users can only post the content. Now, this creates a problem because now the entry has no title and when people “facebook like” it, what they see in their newsfeed/wall is “Xperson liked [Nameofwebsite] on [website].com”. What I am wondering is, how can I change this? How can I do it so facebook grabs the content (at least the first few words) of the post instead of the title?

I have tried using Open Graph and all, but I am not sure how to implement it.

Any kind of help will be greatly appreciated.

Thanks!