it's the berries
dated slang It is highly enjoyable, desirable, or impressive, especially in a fancy or elaborate way. Have you seen Tom's new Cadillac? It's the berries!
It's the berries
Superlative. This 1920s phrase would seem to convey the idea that berries are a choice snack or dessert. A similar phrase, “the bee's knees,” has no such connection with reality aside from its rhyme and cute image.