The that's what she said joke long predates the internet, but it became a mainstream catchphrase through Michael Scott in the US version of The Office, which ran from 2005 to 2013. Clips and variations spread across YouTube, Vine and later TikTok and soundboards, where short voice versions became reusable punchlines. This variant adds a drawn-out woooo for extra emphasis, keeping the familiar setup and payoff in a few seconds. It remains popular because almost any ordinary sentence can become its setup.