Nickname referring to Kira Yamato of the anime series' Mobile Suit Gundam SEED and Mobile suit Gundam SEED Destiny; particularly the latter.
The reason being that Kira Yamato as the main protagonist for most of Destiny was omnipotent. Kira would fly into any ongoing battle with his Mobile Suit (Robot) Freedom Gundam and own every other unit. Along with many other plot and design flaws of the series, Jesus Yamato's onesidedness made the series unwatchable for many.
To be Yamato Nadesico a woman must have these qualities:
Well-behaving, Understanding, Obedient to elders/husband, Beautiful, Caring, Supportive, Enduring, Intelligent, Skillful(mostly household chores), etc.
IMO which is, basically, almost(not completely) an impossibility...
One of many girls attending Yavapai college and participate in many activities similar to that of a common slut or hooker. They can usually be found drunk and at parties all through the week. Showing there breasts and giving oral sex to skinny college kids.