3 hours ago, chromedome said:
That would be the bit we call the "oyster."
The oyster ain't the tail or just above the ass and there are two of them in all fowl still in possession of the standard legs their maker supplies. They aren't triangular either. They are oyster-shaped, hence the descriptor. The pope's nose is roughly triangular and like noses, singular. It is so-named, perhaps because of its resemblance to the nasal appendage of Pope Alexander VI or someone else. It depends who you ask.
It is also referred to as the parson's nose or sultan's nose to followers of different faiths.