Le Chien d'Andalou. I think that is the spelling...
Considering that pretty much all the French films I have ever seen are either old silent films made in the pre-WW1 period when France dominated the global film industry, and one more modern musical (as in every line was sung) that really depressed me, I decided to go with one of the true pinnacles of classic surrealism. Seriously, that movie made no sense, but was bizarre fun in its own disturbing way. I am not sure it counts, though, since the man who made the film was Spanish...