Billy Herrington is an American actor affectionately nicknamed “Big Brother” (兄貴, aniki) within the Japanese video-sharing community Nico Nico Douga. He is the subject of many MAD movies based on various clips from “Workout Muscular Men 3” and other productions where he is seen wrestling in panties. Billy Herrington’s homoerotic wrestling clips became a popular source material for bait & switch trolling; one of the most notable examples depicted Billy practicing what the Japanese call “Gachimuchi Pantsu Wrestling,” in which the loser must allow his pants to be taken off as penalty.
A few months later, the first MAD movies were produced using the footage in various ways such as spanking sounds for rhythms in music based MADs or videos featuring a 3D model of Billy himself. Some of the videos are also known as “Gachimuchi”. Billy Herrington wrestling videos are deliberately tagged with misleading labels like “Wrestling Series (レスリングシリーズ resuringu shirīzu))”, “Forest Fairy” (森の妖精 mori no yōsei) and “Philosophy” (哲学 tetsugaku).