Shit, Piss, Fuck, Cunt, CockSucker, MotherFucker, and Tits
Times have changed since Carlin made these words famous.
Piss is said on regular TV with a growing frequency.
Shit crops up in dialog on the cable channels regularly.
Fuck was immortalized by HBO's Deadwood.
Few rap songs exist that don't use MotherFucker.
Cocksucker is still a bit outre, though it does sneak an appearance into a movie or comedy routine on occasion.
And Tits, well Tits is as Carlin said, cute.
That leaves Cunt as the lone holdout, the one that still can offend even the staunchist free speech advocate. And that is more because its meaning has shifted from being denotive of a part of a woman's anatomy to being a hateful derogatory term for that woman in general.
I think Carlin would choose a different set of words today.
Nigger, Kike, Fag come to mind instantly...
Any suggestions for the other three?