The Portuguese phrase means 'but what is this,' and it is tied to Brazilian creator Nando Moura, whose exaggerated reactions have made him a frequent source for reaction memes in Portuguese-speaking communities. Clips of the line circulate in try-not-to-laugh compilations and short-form videos, where it is reused whenever a creator wants a ready-made expression of disbelief. Because the question is short, instantly readable even without translation, and fits almost any absurd setup, it has remained a handy shorthand for confusion in Brazilian meme culture.
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Nando Moura asks 'mas o que é isso' in disbelief in this short meme clip, used to react to bizarre, unexpected or confusing moments in videos and chats.
This is a short reaction clip built around Nando Moura's incredulous Portuguese question, 'mas o que é isso,' delivered as if he has just seen something that makes no sense at all. The voice is sharp, rising and slightly exasperated, with a pause that lets the confusion land before the phrase finishes. It sounds less like a calm question and more like a comic double take, which is why it works so well as a punchline. Dropped into a video, it instantly frames whatever came before it as absurd, inviting the audience to share the same baffled reaction instead of explaining the joke.
