It could say anything. Like a lot of the Beatles backwards stuff, we read that such-and-such played backwards says this, or that. And once we have that phrase in our head, we can hear it. Otherwise it's just mumbo jumbo.
Here's one for you. About 25 years ago, a bloke I worked with was playing 'Bad Moon Rising', and he said when it gets to the bit where he sings 'there's a bad moon on the rise', in your head say: 'there's a bathroom on the right'. That song has never sounded the same since!!