“Jersey Shore” is about to get bigger. Jenni “JWoww” Farley is planning another boob job to enhance her already enormous assets. She was spotted Friday visiting the Long Island offices of plastic surgeon Dr. Stephen Greenberg, a breast specialist who also has offices on Park Avenue. A source told us, “She wants to get it done as soon as possible to be ready for the new season.” A rep for JWoww refused to comment, and calls to Greenberg’s office were not returned.