The line comes from Disney's animated film Mulan, released in 1998, where Mushu is the fast-talking dragon guardian voiced by Eddie Murphy. Mushu spends much of the film teasing and pushing Mulan with blunt, comedic remarks, and this sheep insult fits his style of calling out mindless behavior. Clips of Mushu's lines have circulated for years in edits and reaction videos, and this short excerpt became popular on soundboards because it works as a standalone joke about peer pressure and copying others without needing the full scene for context.