Where is this strange og:description coming from?

That’s a FaceBook plugin most likely using the output of the post excerpt – via get_the_excerpt() or whatever – to populate the og:description meta tag.

It’s placed there automatically by the plugin.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)