The phrase, popularized by a country song, refers to a worthless promise or blatant lie. The imagery evokes the absurdity of someone trying to sell land that doesn’t exist, as the ocean floor cannot be owned. The song uses this vivid metaphor to describe being deceived or led on with false assurances.
Understanding this figurative language provides insight into both the song’s narrative and its cultural impact. The expression has transcended the original song, becoming a common idiom in everyday conversation to describe any empty or disingenuous offer. Its enduring popularity stems from the potent combination of humor and relatable experience, tapping into the universal feeling of being misled. The phrase’s conciseness and evocative imagery contribute to its memorability and widespread usage.