At some point there'll be a stage when people say "square" when they mean "hip", and "hip" when they mean "square".

After all, the key thing with slang has always been to confuse outsiders, and to define insiders.

Incidentally "Yes" she replied, "as long as they've got a jolly beat" may register as a very square way to put it. But it's still what sells records. Or perhaps these days it should be "what prompts downloads".