There was also the grapefruit diet, the cabbage soup diet, and the cookie diet.
That something unexpected was a tumor the size of a grapefruit in his chest.
The champagne brings out the brightness and tang of the grapefruit.
1814, from grape + fruit. So called because it grows in clusters. The fruit itself was known since 1693 (in Hans Sloane's catalogue of Jamaican plants); presumably it originated there from chance hybrids between other cultivated citrus. It was known by various names before the current one emerged. An ornamental plant chiefly at first, not much eaten until late 19c.