刚去4chan和NTP上看，貌似也是个悬案。
目前看到的比较被接受的某个回答是这个
Korean here. Sadly, there's no source. Koreans call her ant-waist girl, pretty much what we know as coke bottle body. There are four Ant-Waist Girl series, the guy in pictures, telling a story of how he seduced the girl and how good she was. However, Koreans discovered that this was just a marketing stunt by Korean porn(?) site, Sora.net.
翻译下就是
在下棒子，很遗憾这个木有出处。俺们称其为蚁腰妹，就像传说中的可乐瓶哥一样。蚁腰妹有四个系列，图片中的那个家伙讲述了自己是怎么勾搭这妹子并狂炫耀了一把。然而俺们发现这货只是给一个叫sora.net的高丽瑟琴网站打软广告。
