An annoying phrase used in many utube poops to get a cheap laugh. It was in an episode of the super Mario show. It is a scene where Luigi carves a stone out of rock and Mario doesn't believe he made it.
Luigi: Hey mario, look what I made!
Mario:Its a stone luigi, you didn't make it!
Luigi:(shakes head) its a football.I chiseled it!
Mario:Its a stone Luigi.
luigi:football.(in some utube poops, this could go on for 5 minutes)