(Adult / Slang)
Dated or outdated usage for:
1. From the 17 th century onward, the female genitalia and vagina; based on appearance, texture, and delicacy; the synonyms: oyster-catcher / oyster bed , now obsolete, were coined in the 19 th century; hirsute oyster was coined in the 1990s. See vagina for synonyms.
2. Ejaculated seminal fluid or gob of semen, based on consistency and pearly appearance. Usage in the sense dates back to the 17 th century. See semen for synonyms.
3. In gay parlance, the mouth, especially that of a fellator.
an under sea animal that has pearls inside
It's a type of animal belonging to the family Ostreidae