The line comes from Oklahoma State head coach Mike Gundy's press conference on 22 September 2007, after a win over Troy, when he angrily defended quarterback Bobby Reid from newspaper criticism and declared that he was a man and forty years old. The outburst was replayed on sports television, clipped for YouTube and message boards, and later adopted by meme editors who liked its raw, unfiltered defiance. It endures because it works as shorthand for standing up for yourself, especially in sports arguments, rivalries and comeback videos.