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?

If you've been inundated lately with photos of a smirking Blue Grinch saying, "That Feeling When Knee Surgery Is Tomorrow," you have come across an oddly specific meme that is caked in layers of irony ...

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