When you check your facebook page and a facebook whore has posted on every status, link, picture or wall post. Essentially it's when a person feels it necessary to post on everything you say b/c they are either bored and have no life or they have access to facebook via a mobile device and are not paying attention to the road while driving or not working when getting paid to....
> God damn it! This bitch has postfucked my [facebook] page. She has to comment on everything within seconds of me adding a comment!