1. Anatomy, Zoology: The passage leading from the uterus to the vulva in certain female mammals.
2. That which to homosexual men is akin to looking directly at the sun without a welders mask or similar.
Entering the Queer lexicon circa. 2010-2011, it is an extension of the common Cockney slang word for friend or mate, 'China Plate.'
However, when said within the context of it's native area, Dulwich Hill, finechina is only acceptable in speech when utter in a rapid, heady and aspitated manner by a woman.