cavern n.
(Aus.) the mouth.
![[Aus]](/static/img/flags/aus.png "Australia") | Bulletin (Sydney) 18 Aug. 14/3: I have seen an aboriginal, scratching out a nest, reject the fresh eggs, open one with a fair-sized chick inside, take this by the legs, open his ‘cavern,’ and swallow the chick like an oyster! |