What the h*** does 'monkey on a rock' mean?
The only reference I found to this phrase is attributed to David Letterman. He is quoted as saying, "I wouldn't give your troubles to a monkey on a rock."
I'm still not quite sure what that means, but the site I found explains it by saying that Letterman "cares nothing for (the) monkey on a rock" so perhaps it means that your troubles are so awful they shouldn't be wished on someone for whom you care nothing?
Sorry I couldn't be more helpful.
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Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them