"It's quote from a work of literature.
Try a web search."
,..,
Whoever posted this at 0415 pm -- Do you really imagine I would have posted such a question without doing a web search first?! It was the fruitlessness of that search which induced the post, obviously.

Thanks for the pointer to Douglas Adams. But it sounds as if he is simply using an established phrase in dialogue, rather than coining one. Still can't make out what exactly it's supposed to mean. WHICH rocks? To what purpose?

Still puzzled ···

≈M≈