Fun Fact: Oyster: oys·ter
noun, often attributive \’ȯis-tər\
Definition of OYSTER (Merriam-Webster)
1a : any of various marine bivalve mollusks (family Ostreidae) that have a rough irregular shell closed by a single adductor muscle and include commercially important shellfish b : any of various mollusks resembling or related to the oysters
2: something that is or can be readily made to serve one’s personal ends <the world was her oyster>
William Shakespeare (c:1600) is credited with first using the phrase in his play “The Merry Wives of Windsor” in Act 2, Scene 2, 2-5
Pistol: Why then the world’s mine oyster/which I with sword will open.