R

This is Spinal Tap is rated R, although one wonders what it might be rated in this day and age, now that everyone's been totally corrupted. There's some naughty language, some uber-suggestive song lyrics, and the description of an album cover that, if shown, might have gotten the movie an NC-17 rating.

And yeah, the cucumber.

But when we look back on it, the most shocking thing about it is that kids weren't able to see it in theaters with parental guidance. They don't even show any actual armadillos.