Updated list because I watched more movies recently:

10. Mad Max: Fury Road 
9. Evil Dead II
8. National Lampoon's Vacation (the original, not the remake)
7. Forrest Gump
6. Star Wars: The Force Awakens
5. A Clockwork Orange
4. The Road Warrior
3. A Boy And His Dog
2. Pulp Fiction
1. 2001: A Space Odyssey

Honorable mentions include The Hangover, Lolita, Big, Dr. Strangelove, 21 Jump Street, The Godfather Part II, Hitchhiker's Guide to the Galaxy, The Shawshank Redemption, Monty Python and the Holy Grail, The Breakfast Club and Reservoir Dogs.