CNN —A criticism of US lawmakers by the President of South Korea has gone viral on social media – after a hot mic picked him up using an expletive. In a video published by South Korean television broadcaster MBC on its official YouTube channel on Thursday, Yoon can be seen walking along the stage after chatting with Biden before turning to his aides and speaking. The Global Fund is an international organization trying to defeat HIV, TB and malaria across the developing world and Yoon’s remark appears to be a reference to Biden’s pledge to contribute $6 billion, which would require Congress approval. Many social media users have taken to mocking Yoon, while the expletive he used has become a popular search term on the South Korean online portal Naver. His remarks were not lost on members of the opposition liberal party who commented on the issue at Thursday’s National Assembly.

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