Puns may be the lowest form of humor, but I find that they're often the most hilarious (in a very sad and disheartening way). I think there needs to be a Wiki page dedicated to this, but until then, post any movies that have pun-based titles here. I must know them all.
"God dammit, we need to send this shipment back. Those idiots misspelled the fucking ti... Wait a minute... Yes!"
Here are some to get started:
Pure - Fucking - Genius
These are the epitome of movie titles folks. Soak 'em up!