SWEETHEART

[noun] [C] - a person you love, esp. a person with whom you have a romantic or sexual relationshipShe eventually married her childhood sweetheart."Happy birthday, sweetheart," he said. [as form of address]Sweetheart can also mean a kind and generous person."Oh, you're a sweetheart," she said, when I placed the breakfast tray on her lap.A sweetheart deal/sweetheart agreement is an agreement that you make in which you get something that is to your advantage, esp. by agreeing to give up something else.