'Isso é um assalto' is a Brazilian Portuguese meme phrase meaning 'this is a robbery,' circulating online as a short voice clip used for prank-style humor. It spread through meme pages and short-form video, where creators pair the commanding line with harmless 'heists' like stealing a friend's fries or landing a surprise play. Because the audio is only about three seconds long, it slots neatly into reaction edits, gaming montages and WhatsApp joke chains. Its staying power comes from the format: one deadpan threat, instantly defused into comedy.