Goober, you brought further stupidity upon that song, which was already bad enough as it was...
Joy to the world, the teacher's dead
We barbecued her head!
But what will we do with the body?
We'll flush it down the potty
Around and round it goes,
Round and round it goes,
We need a second flush, I see her toes!
If you're going to introduce a stupid, oversung, juvenile song, atleast have the decency to get it right. 
...But even
you didn't get it right! The true lyrics are as follows:
Joy to the world, the teacher's dead
We barbecued her head
What happend to the body?
We flushed it down the potty
And round and round it goes,
And round and round it goes,
...and the final line can be debated, but the above was the version used on The Simpsons, which was interrupted before it was finished.
