Term, presumably, coined by comic critic
Dirk Deppy, used to describe drawing habit (mostly in comics and manga) where
female upper clothes or armor are displayed the way, that they wrap around breasts, implying, that actual clothing piece or armor plate has special department for boobs. This comes from many (mainly male) comic or manga artists, thinking, that any cloth would automatically conform to the
female breasts, where in reality they haven't seen a real boob once in their life.