British regulators determined that a joke about Queen Elizabeth II having sex "breached" broadcasting rules.
The edition of the show, which aired in April this year, featured a panel of comedians who are given a subject which they have to prove is not funny. If the audience does laugh, the subject passes to the next contestant.
Panellist Russell Kane was asked to explain why there was nothing funny about why the Queen, who has four children, must have had sex at least four times in her life.
"Four times we have to think of republicanism as we imagine four children emerging from Her Majesty's vulva," said Kane to audience laughter.
Ofcom ruled that the quips, uttered on BBC Radio 4, were "not justified". Moreover, "the potential for offence was increased by the fact that these remarks were broadcast on the Queen's 90th birthday".
The show, Don't Make Me Laugh, was cancelled in the wake of the controversy, which led to a staggering 12 people writing in to complain.
I can't immediately find a clip of the segment in question, so you'll instead have to make do with some amusing media navelgazing over a previous instance of British lese majeste, wherein the line "I'm so old my pussy is haunted" was repeated in Streisand-esque fashion in a watchdog show.
No sanctions were reported other than Ofcom's stern telling-off. But whatever you do, don't talk about Queen Liz getting into bed with Donald Trump.
UPDATE: I believe this is the episode in question, but haven't got a timestamp for you yet: