Derogatory term in the Brony community used to refer to the controversial alicorn princess version of the My Little Pony character Twilight Sparkle. Alicorns are demigod-like beings in the poniverse that have both wings and a unicorn's horn, and when the show's producers decided to transform one of the show's main unicorn characters into an Alicorn Princess, a large section of the fandom did not receive it well.
Disgruntled Brony: "Twilicorn is worst pony."
by WonderboltsNumber1Fan May 05, 2013

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