The line comes from My Little Pony: Friendship is Magic, where Rainbow Dash uses it while judging a dress design she finds too plain. Fans clipped the moment early in the show's online life, and it became a shorthand in the brony community for demanding a cooler version of almost anything. It later spread beyond the fandom into general meme edits and reaction videos, where the percentage itself became the joke. It endures because it is short, instantly recognisable and easy to drop over any upgrade.