A British bakery company polled 2000 people for the top cheesiest lines of film dialogue (to celebrate of the launch of their new cheese-flavored crumpets). These are pretty good, but I *know* I've heard cheesier.
http://news.bbc.co.uk/2/hi/entertainment/4070771.stm
http://news.bbc.co.uk/2/hi/entertainment/4070771.stm