Glasgow, UK - President Joe Biden is no stranger to the occasional public gaffe, and his latest is one that the Duchess of Cornwall won't be likely to forget.

While Camilla Parker Bowles, Prince Charles' wife, was talking to Biden at the COP26 climate summit in Glasgow, the president of the United States allegedly let one rip.

At least that's what an anonymous source close to Camilla and her family claims.

The insider told the New York Post, "It was long and loud and impossible to ignore."

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"Camilla hasn't stopped talking about it."

Biden met the duchess last Monday at a reception at the Kelvingrove Art Gallery, with Camilla's husband Prince Charles and British Prime Minister Boris Johnson also in attendance.

The president's audible flatulence would not be his first mishap in Glasgow.

Just hours before, Biden appeared to doze off for 22 seconds during a speech by Eddie Ndopu, a South African disability rights and sustainable development activist.