The 'Sexy Sweaters' meme, most notably featuring the 'Virgin Killer' backless sweater, became a massive internet phenomenon originating from Japanese social media and retail sites around 2017. The knit garment is characterized by its high turtleneck, sleeveless cut, and a strikingly deep open back. It quickly evolved from a niche fashion item into a widespread meme within the anime and cosplay communities, where artists would draw popular characters wearing the daring outfit. Today, the meme is used to poke fun at impractical fashion trends, subvert expectations of 'modest' winter wear, or highlight the absurdity of viral internet aesthetics and the 'expectation vs. reality' trope.