>>1162217 Vagina has been the common way to refer to the female genitals in general - outside of clinical terminology - for god knows how long now, at least in american english. Technically correct or not, it's well established vernacular.
The Queen may have a different opinion on how to refer to her royal snatch in her version of the language, but it's probably irrelevant to most of 4chan.
Now go home and drink your fucking tea.