The line comes from SMG4, the long running YouTube parody series that reimagines Mario and other game characters in chaotic, meme heavy stories. Fans clip single insults and reactions from episodes and repost them as standalone sounds for edits and soundboards. This particular Mario outburst spread because the phrasing is instantly quotable and works outside its original scene. It is now used less as a reference to a specific episode and more as a general reaction for disbelief, annoyance and playful shade in gaming and meme communities.