My family is totally obsessed with the Muppet Christmas Carol.
Every year we watch it and sing along at the top of our lungs while we also yell at dad for talking during the non-singing parts and grouch at mom for singing like it's an opera, and scowl at cousin Andrew for liking the really slow boring song right in the middle that we always want to fast forward through. It's tradition! Besides, Michael Caine is one of the greatest actors ever.
So whether you're the grouch-er or the grouch-ee rock your inner grouch in a lighter way this Christmas by making the people around you smirk as they glance at your "Humbug" shirt.