A person who updates their facebook so often that it fills up the home page for everyone of their friends (usually with silly photos and one-line comments).
I opened my facebook only to discover that Shelly had filed the page with minute by minute coverage of her kids at the beach. She is such a facebook hog.
I thought my friends were nice girls, but after spending a few nights in their company at the night club, I discovered that they are in fact filthy slam hogs.