You might have seen an image of a blue-tinted, smiling Grinch with the caption, “That feeling when knee surgery is tomorrow.” The meme has proved surprisingly durable, but what on earth does it mean?

Dr. Seuss' Grinch is a beloved and iconic part of Christmas, well known for his hatred of the holiday, two-sizes-too-small heart, and loyal dog, Max. Most viewers will recognize him from the 1966 TV ...