"In Davy Jones Locker" is a phrase often used to describe something lost in the sea or irretrievably lost. It has various synonyms that may better suit different contexts. "Lost at sea," "sunk," "submerged," "sunken," "buried at sea," "deep-six," and "gone forever" are some of the common alternatives. For example, if someone loses their phone while on a boat trip, it can be said that their phone has landed in Davy Jones Locker or is lost at sea. Similarly, a shipwreck that sank with all its treasure on board is said to be buried or sunken in Davy Jones Locker. The phrase's synonyms provide varying connotations, making it useful to choose the best fit for the situation.