The original video behind this phrase is not documented, so it is best understood as a piece of Brazilian internet slang that travelled as a short, shareable audio rather than as a clip from a named film or show. Its humour comes from the exaggerated combination of morri, meaning dying of laughter, and bugou, meaning glitched or malfunctioned, applied to a woman acting in an unexpected way. That simple, repeatable wording helped it move between meme edits, reaction videos, and chat messages, where it still works because the situation it describes is instantly familiar even without knowing the upload.