The Proper Anatomy meme, also known as Anatomy of X, is a popular internet format that involves taking a scientific-style diagram of an animal or object and replacing the formal terminology with humorous, colloquial descriptions. It often highlights the endearing or frustrating traits of pets, such as referring to a cat's paws as 'murder mittens' or a dog's nose as a 'boop sensor.' The trend gained significant traction on platforms like Tumblr and Pinterest before spreading to Reddit and Instagram, where users began applying the logic to everything from video game characters to everyday household items. It functions as a form of internet slang visualizer, allowing creators to celebrate the quirky characteristics of their subjects in a pseudo-educational layout.