сольётся?

Hi,
can you tell me what сольётся means and also what нечем (with nothing?) means here.

thanks

А вот ты поработай своей головой, пока не распухнет, пока пол с потолком не сольётся! И когда жужжать уже нечем, вот тут и ползёшь туда, где открыто. Если б ты знала, как мне сейчас хорошо!

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пока пол с потолком не сольётся

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Here author means, that you got tired to that degree, that the flour and the ceiling would merge in your eyes.

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когда жужжать уже нечем

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It is pretty interesting phrase but the sence is the same (You got tired to death). As everyone is used to know, there is a sort of stuff, which makes bees buzzing. So when a bee is very tired and it isn't making it buzz any more, it is obviously out of that stuff :). That is the case.

So

You should better work using your head until the moment when it swells and the flour merges with the ceiling. And when you're out of the stuff to buzz with you would be crowling to the open place. I wish you knew how great I'm feeling myself now.