These mishearings are called mondegreens, from the understandable mishearing of The Earl of Murray, "They have slain the Earl of Murray, and Lady Mondegreen." The word was coined by author Silvia Wright in 1954.

I got the book "Scuse Me While I Kiss This Guy" as a gift, and found most of the alleged mondegreens in the book are too farfetched to be probable mishearings of the songs in question.

But real, honest mondegreens can be a lot of fun. I mentioned one from my own childhood in an earlier thread:

Up on the rooftop reindeers' paws...

But perhaps the best comes from a mishearing of a newscast:

Next, we'll hear from our meaty urologist.

Alex