Buckaroo Banzai is #2, and #1 by Fog score. Helps to have your main character named "Buckaroo", I guess. And your mcguffin named the Oscillation Overthruster.
You could improve the score by mitigating the effect of words that occur often, e.g., by dividing by the log(word frequency). This would cover both names and effects of movie-specific language (think Star Trek)