Tweedledee and Tweedledum first appeared as twin brothers in Lewis Carroll's Through the Looking-Glass, published in 1871, where their nonsense rhymes and petty arguments became one of the book's most memorable comic episodes. The names later travelled through stage, film and animated versions of Alice's adventures, turning the phrase into shorthand for a pair who look, sound or act alike. On soundboards and in short-form video, the chant is now reused as a quick marker for silliness, doubling and playful mockery, which helps explain why a Victorian literary joke still lands in modern memes and edits.