The taunt comes from the Back to the Future films, where Biff Tannen bullies Marty McFly and chicken is the insult Marty cannot ignore, turning a schoolyard dare into a recurring weakness that drives his worst decisions. Fans clipped the exchange for edits and reaction videos, where the familiar bully voice instantly signals peer pressure without needing the scene around it. It remains popular because the joke is simple, recognisable and easy to reuse whenever someone is hesitating, backing down or refusing a challenge online.