It's been a while since I first heard this, and I still don't get it. Maybe I have to watch the episode to grok it.
Jingle Bells
From the episode $pringfield (Or, How I Learned To Stop Worrying And Love Legalized Gambling)
Goulet: Hi. You from the casino?
Bart: I'm from a casino.
Goulet: Good enough. Let's go.
Smithers: I'm afraid Robert Goulet hasn't arrived yet, sir.
Burns: Hmm. Very well; begin the thawing of Jim Nabors.
Goulet: Are you sure this is the casino? I think I should call my manager.
Nelson: Your manager says for you to shut up!
Goulet: Vera said that? Hmph.
Jingle Bells, Batman Smells
Robin laid an egg
Batmobile lost its wheel
The Joker got away, hey!
Thank you, thank you very much.
*Sound of something getting hit*
Oh, I'm sorry, kid...