There is a so-called list called “Seven Dirty Words” which contains the words forbidden to be aired on US broadcast television. This came about in 1978 when the Supreme Court was petitioned to rule on the decency of a George Carlin skit. If these words are uttered, they must be replaced by a “beep” censure.
The seven words are: shit, piss, motherfucker, cocksucker, fuck, cunt and tits.These words were part of Carlin’s comedy number; other words are routinely considered indecent or unacceptable and are bleeped. Broadcast times also have a direct impact on language used - no vulgarity between the hours of 6pm - 10pm.