The phrase itself comes from everyday Brazilian Portuguese street humour, where shouting about a thief is a familiar way to raise the alarm. Online, short clips built around that shout have circulated as reaction audio for prank and comedy edits, especially where a culprit is suddenly exposed. Because the words are short, rhythmic and easy to imitate, the sound works even for audiences who only catch the energy rather than the literal meaning. Its continued use comes from that instant recognisability: one shout signals guilt, panic and a crowd turning on someone at once.