The presenter couldn’t hide her smirk as “anally” was offered as a solution to a puzzle on the Channel 4 numbers and letters quiz show on Friday.
But to top if off, the remaining letters of the anagram had also left “poo” up on the board.
When one fan tweeted her commenting that it was quite a way to mark her 3000th show, Rachel responded: “Is there any other way?!”
Rachel has now co-hosted 3000 episodes of Countdown since taking over from previous maths whizz Carol Vorderman in 2008.
To celebrate the occasion, she was visited by her partner, former Strictly Come Dancing professional Pasha Kovalev, and their daughter Maven in the studio and was also presented with flowers by the production team.
Rachel tweeted: “Loved my surprise visitors for my 3000th show today! One of them was particularly disappointed when it was time to go.”
She added: “I’ll always be the new girl but who can believe it’s been 3000 shows already!Thanks Countdown family.”
Earlier this week, Countdown came under fire when a competitor’s answer of a seven-letter gay slur was left in the programme.
Channel 4 later apologised admitting they had got it wrong.
“The airing of the word was an error of judgement,” the broadcaster said.
“It does not align with our values and we apologise for any offence caused.”
Countdown airs weekdays at 2.15pm on Channel 4.