Hm. Well, it's a bit hard to explain nonsense. I mean, it's nonsense. The whole point is that it doesn't have an explanation.
Perhaps that, in a sense, is the meaning of everything. For you see, all textual sources - even religious ones - claim that everything began with nothing. So perhaps, to truly understand the meaning of life, the universe and everything, we must first understand nothing at all.
I don't know how you would do that, though. Maybe spin around in a chair for hours on end? I hear that's a good way to kill brain cells. Maybe having nothing in your head will leave you with a perfect understanding of complete nonexistence, and henceforth, nothing at all. But how would one understand something without knowing how to understand anymore?