There's the ru-u-u-b... Rubba-dubba-dub-dub rub.
8 seconds sound clip from the Jack Frost (1979) movie soundboard.
You can hear this line at 00:22:08 in the Blu-ray version of the movie.
Quote context
[...]
- Now he lives alone in his castle, high on Miserable Mountain.
- I'm Kubla Kraus, I'm King of all the Cossacks, but there are no Cossacks to be king of.
- There's the rub... There's the rub... There's the rub...
- I could have been a pharaoh, but there are no pyramids around here.
- There's the rub... There's the rub... There's the rub... (2)
- There's the ru-u-u-b... Rubba-dubba-dub-dub rub.
- I rule with an iron hand. I get whatever I demand.
- I own the people and the land, so why is it I'm not happy? I don't understand.
- I could have been a rajah, but there are no elephants around here.
- There's the rub... There's the rub... There's the rub... (3)
[...]