Mama Luigi comes from the 1991 Super Mario World animated series, where Luigi was voiced by Tony Rosato and nicknamed in the episode Mama Luigi. The character later became a staple of YouTube Poop edits in the late 2000s, where his lines and reactions were remixed endlessly. This scream survived as a standalone scream meme because it is instantly recognizable, short enough for quick edits, and funnier than a realistic yell, so creators still drop it into gaming and reaction videos today.