We've all been guilty of a slip of the tongue here and there - calling your teacher 'mum' or accidentally saying a rude word in front of an impressionable toddler.
But one kid in Bristol did one better than all that, not only dropping the F-bomb to a roomful of people, but doing so while in the presence of royalty.
I know, bold.
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Harry and Meghan - who are expecting their first child this spring - were in Bristol on Friday for a royal visit, meeting school kids and helping out at charities and such.
After popping down to Abbeywood pre-school to greet a group of school children, the pair headed to Bristol Old Vic theatre to find out more about the Future Quest workshop, which 'uses theatre as a tool to develop speaking and listening skills, to increase self-confidence, collaboration and creativity'.
They were also shown around the theatre's Noises Off exhibition, which charts 250 years of sound technology in theatre, and enjoyed a performance form Bristol Old Vic's Young Company, who treated them to a rendition of a song from their production of Hercules.
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During their time at the historic theatre, they met a teenage boy who talked to them about how posture helped him find confidence on stage.
"You can't just be f***ing around on stage," he told Harry and Meghan.
WARNING: CONTAINS EXPLICIT LANGUAGE
While the royal couple look a little taken aback at first, neither of them seem particularly phased - Meghan laughed it off while Harry goofed around a bit.
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"So you're planted?" Meghan asked then teen.
Harry added: "Do they call that stage presence?"
Later that day, they also visited a local charity called One 25, which helps women break free from street sex work, addiction and other issues.
The Duchess helped pack lunches and warm clothing that would get distributed to women working on the streets that night, and even signed a few bananas with inspirational mesages like 'You are special' and 'You are loved'.
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Harry and Meghan then rounded the day off by checking out a kids' boxing charity called Empire Fighting Chance, which uses the sport to help turn children's lives around.
Busy day to be a royal, eh?
Featured Image Credit: Kensington Palace/Twitter
Topics: News, UK, Royal Family, Prince Harry, Meghan Markle