Davy Jones’s lock‧er /ˌdeɪvi ˌdʒəʊnzəz ˈlɒkəʳ $ -ˈlɑː-/
an old-fashioned humorous name for the bottom of the sea, where people who die at sea are said to be:
The old pirate’s in Davy Jones’s locker now. [TahlilGaran] Dictionary of Contemporary English ▲