In one part of the movie, Eric Cartman has had a V-chip (like those used in TV sets) implanted in his head. This doesn't let him swear. He's not even allowed to say "*ss" or "p*ss".

But later, when the kids are singing the song "What would Brian Boitano Do?", Cartman is singing along to the whole song. You can see the animated lip synching. But the song contains words that the V-chip would normally never let him use, such as "I'm sure he'd kick an *ss or two, that's what Brian Boitano'd do".

Yet Cartman isn't electrocuted! How? He even sings about the V-chip at that point, so it's still implanted in his Broca's area.