I was watching How the Grinch Stole Christmas and I was struck by this rhyme (from the song  "You're a Mean One, Mr. Grinch:")

You're a nauseous super naus!
You're a dirty crooked jockey, and you drive a crooked hoss
   
-- Dr. Seuss, How the Grinch Stole Christmas

I tried to see what other particularly excruciating rhymes I could remember.  I came up with two:

You know, that little guy, he's got me feeling all contempt-ey:
He takes his boat out loaded up and brings it back in empty.
   
-- Phil Vischer, Lyle the Kindly Viking

And then of course:

In short, when I've a smattering of elemental strategy,
You'll say a better Major-General had never sat a-gee!
   
-- W. S. Gilbert, The Pirates of Penzance