The line comes from The Office, the American workplace sitcom, where its blunt, offended delivery made it easy to lift out of context. As short clips from the show circulated as memes and soundboard sounds, 'How dare you' became a shorthand reaction for disbelief and playful indignation online. Creators reuse it because the wording needs no explanation and the tone does the comedy work on its own. Its staying power comes from that instant recognition, letting a familiar TV moment stand in for a personal reaction in edits, streams and social posts.