![1girl :s absurdres amaroku_neko ass bag black-framed_eyewear blush breasts fate/grand_order fate_(series) glasses hair_over_one_eye highres looking_at_viewer mash_kyrielight meme_attire purple_eyes purple_hair short_hair shoulder_bag sideboob solo virgin_killer_sweater white_background rating:s score:41 1girl :s absurdres amaroku_neko ass bag black-framed_eyewear blush breasts fate/grand_order fate_(series) glasses hair_over_one_eye highres looking_at_viewer mash_kyrielight meme_attire purple_eyes purple_hair short_hair shoulder_bag sideboob solo virgin_killer_sweater white_background](/cdn_image/preview/db/18/db1832769d10fc22983fb08f884e2464.jpg)
A particular kind of backless halterneck turtleneck ribbed/aran sweater dress with a drawstring around the neckband that has gone viral from this tweet on January 25th, 2017. Most often seen worn naked, although can be worn with clothes underneath such as in post #2616126. Frequent features include sideboob, bare back, bare shoulders and butt crack. Also can be seen worn backwards such as in post #2611295.
Before magane4989's tweet, this sweater was shared by Japanese cosplayer Noraneko (のらねこ) under the term スケベニット (Perverted Knit) with this tweet in June 2016. The corresponding tag on pixiv only received about 30 uploads prior to its boom in popularity when magane4989 named it thus.
このセーター・・・エロい
童貞殺すセーター
This sweater... is erotic
A virgin killer sweater
Also called 例のセーター or that sweater as with the open-chest sweater, albeit to a much larger degree in comparison with the latter. Not to be confused with virgin killer outfit, despite them sharing the same naming inspiration.
This tag implicates meme_attire (learn more).