Joe Biden used come on man for years as a folksy pushback phrase, and it became a signature line during his 2020 presidential campaign and televised debates and interviews. Clips of the delivery circulated widely on social media, where editors isolated the phrase into a short reaction sound. Its familiarity from news coverage helped it spread beyond politics into everyday meme use, where it now signals disbelief at any statement, not only a political one, and remains a common shorthand for exasperated dismissal.