How can i select a post to not publish to facebook?

Hi guys i have auto posting to Facebook on, to a page, i know there is a box bellow the post to select different name for Facebook post, but what i want is to tell WordPress on a post to not auto publish to Facebook, i am doing some manual posting directly in Facebook and putin some short links back to the page, but i still want others post to auto publish to Facebook, so i don't want to deactivate the auto-post option all together just the posts i am working on.. any ideas?

Cheers
Alex