The line comes from Swedish climate activist Greta Thunberg's speech to the United Nations Climate Action Summit in New York in September 2019. Addressing world leaders, she repeated how dare you while accusing them of failing younger generations on emissions. The speech was broadcast worldwide and the phrase was quickly clipped, remixed and turned into a reaction sound on meme pages and social media. It remains popular because the delivery is instantly recognisable and works as a mock serious reprimand far beyond climate politics.