That world that can't be mentioned in polite company

That world that can't be mentioned in polite company (or censored as #!@€$!#%&) was a planet with a name or meaning so filthy, that it results in disgust by other people just by the mention of the planet. When Philip J. Fry mentioned it, he was even subjected to a slap by Professor Farnsworth.

During the V-GINY censor ship's raid on indecent planets, this world was also destroyed, along with Planet XXX and Poopiter.