I got Christmas Vacation in my stocking. Just watched it. Wow, I forgot how much swearing there was in this one. Not *that* much, but when you're watching it with your 10-year-old girls you tend to notice a lot more of the colorful language. Still has one of the insult lines when Clark skewers his boss:
... I want to tell him what a cheap, lying, no-good, rotten, four-flushing, low-life, snake-licking, dirt-eating, inbred, overstuffed, ignorant, blood-sucking, dog-kissing, brainless, dickless, hopeless, heartless, fat-assed, bug-eyed, stiff-legged, spotty-lipped, worm-headed sack of monkey Dung he is!