Countdown viewers were shocked after a 'filthy' letters round revealed not one but two rude words.
The blunder no doubt left cast and crew members blushing as the two inappropriate words "pornier" and "rideable" were spelled out in Thursday's show.
Dictionary corner presenter Susie Dent noticed both words in the episode.
But her colleague and co-star Grace Dent admitted she had no knowledge of one them, saying: "We have a seven, pornier, which I don’t quite understand what it is."
Susie was left to clarify: “It means more pornographic.”
Show presenter Rachel Riley was left wide-eyed in the awkward position of standing next to the board with the rude words spelled out behind her.
But fans of the show couldn't resist taking to social media to mock the show's racy moments.
One fan said: “Today’s Countdown was nothing but filth.”
A second joked: “I think we need the show pre-recorded or put on past the watershed."
And it's not Susie's first look at rude words this week as she's also shed light on another in a column for Why Now entitled Susie Dent's Introduction to Swearing - The F-word.
The Countdown Lexographer questioned the most versatile word in the English language before concluding: "It’s likely that ‘f**k’ would be near the top of the list".
She continued: "For good reason: how many other words can act as a noun, a verb, an adjective, an intensifier and an everyday filler?"
She quipped: "The F-bomb is now used so prolifically it’s become something of a damp squib."
Meanwhile back in her day-job, Susie is now joined by Weakest Link host, Anne Robinson, 76, who has taken on the helm fronting the show after Nick Hewer's departure of the Channel 4 show.
Rachel said of the new line-up in a statement: "It’s been really fun watching Anne very quickly find her feet in the Countdown studio and seeing the contestants in the new groove with her.
"She’s not shy of asking them funny questions and the responses have ranged from going into their own comedy routines to not looking directly at her and hoping she doesn’t see them."
Countdown airs weekdays at 2:15pm on Channel 4.
