"Dreidel, Dreidel, Dreidel", also known as "The Dreidel Song" and "I Have a Little Dreidel", is a Jewish song that has appeared a few times in the series, beginning with the Season One episode, "Mr. Hankey, the Christmas Poo". It was heard prior to that in the short, Jesus vs. Santa.
After the boys come to the conclusion that Christmas is all about presents, Kyle announces that if you're Jewish, you get presents for eight days. Stan and Eric Cartman then decide that they want to be Jewish too. The boys leave, singing the song. This scene is briefly recalled in "A Very Crappy Christmas".
In "Mr. Hankey, the Christmas Poo", while Kyle is committed to the asylum and everyone is about to begin their "non-offensive non-denominational holiday play," Sheila Broflovski wishes that Kyle was there to see it. The scene then cuts to Kyle in the asylum, singing the song in a somewhat crazed fashion.
Later, in "Mr. Hankey's Christmas Classics", Kyle begins singing the song as "I Have A Little Dreidel" to Ike Broflovski while instructing him on how to play with the dreidel. Cartman then enters with his own anti-Semitic verse. Stan later joins in with a verse of his own. Kyle's parents also eventually join in, and they all end up singing their own verses in concert. In this version, Kyle is the only one singing the original words.
"Wait a minute!"
"Aren't you Jewish, Kyle?"
"Yeah, I think so."
"Dude, Jewish people don't celebrate Christmas. You're supposed to sing Hannukah songs."
(singing) "Dreidel, dreidel, dreidel, I made you out of clay. Dreidel, dreidel, dreidel--"
"That's a stupid song."
"I have a little dreidel, I made it out of clay. / When it's dry and ready, with dreidel I shall play."
"H I J K L O P, up the sun ... like ... all the rain ... came down the rain and washed the spider out"
"Jews... Play stupid games... Jews... That's why they're lame."
"I'll try to make it spin, it fell, I'll try again."
"When you learn to make the dreidel spin, you'll know our people always win.
"Courteney Cox, I love you, you're so hot, on that show."