The line comes from A Slap on Titan, a YouTube parody series that redubs Attack on Titan scenes with absurd, deadpan comedy dialogue. Clips from the series were widely shared as reaction sounds because short lines could be lifted out of context and still land. This question survived as a standalone meme insult, used in edits, comments, and soundboards whenever someone seems dazed or says something nonsensical. Its appeal is the mismatch between the serious anime source and the completely pointless potato accusation.