Uranus
5
And now a scene from Futurama:
Fry: I hope I don't smell Uranus.
Leela: I don't get it.
Professor: They changed the name of that planet centuries ago to end that stupid joke once and for all.
Fry: Whats it called now?
Professor: Urectum
I realize that if you have never seen Futurama that will be lost on you. But then, if you haven't seen Futurama, you haven't really lived.