The phrase "cry me a river" is a sarcastic idiom used to dismiss someone's excessive complaining or self-pity. It suggests the person is manufacturing a flood of tears over a trivial matter, implying their distress is performative and unwarranted.
Popularized by the 1955 jazz standard "Cry Me a River" (written by Arthur Hamilton), the phrase evolved into a standalone retort. It carries a mocking, unsympathetic tone—often deployed when someone dramatizes a minor inconvenience or seeks unwarranted sympathy.
While humorous among friends, it can be cutting in serious conversations. Use with awareness of the power dynamic and the other person's actual circumstances.