The rules are capricious and there isn’t an official list. One radio station I worked at it was fine. One TV station I worked at in the same market had it on their list of “not allowed” words. I got burned on that once during 60 Minutes. When The King’s Speech came out Andy Rooney, their curmudgeon editorialist who among other things once used his time to explain why he hated chocolate chip cookies, decided to share a story of when he met the king during WWII. The part he loved was when one of his best friends felt slighted because the king didn’t shake his hand and mocked the king’s speech impediment after he left. Rooney thought that was just hilarious and wanted to share it with America. Anyways, I was doing paperwork to get ready for the evening and next day since 60 Minutes is generally such a tame show, so as he stuttered out “g-g-g-od-d-d-d-amn” I wasn’t close to the button and by the time I hit the button to bleep it, I actually missed it so everyone heard it and then it went silent. When I got called in to the manager’s office the next week they said that actually all the complaints they’d received were from people saying we shouldn’t be trying to censor that. They still weren’t happy that I didn’t hit the button in time, but they increased the length of the delay so there would be more time to hit the button and it was mostly a slap on the wrist.

I still hate Andy Rooney.