The phrase comes from everyday Brazilian slang, where se loko is a loose way of calling an idea crazy and num compensa means it is not worth it. Clipped into a short audio, it spread through WhatsApp groups, meme pages and short video edits as a ready made reaction. Its appeal is how specific and musical the delivery feels, even for listeners who do not speak Portuguese. It remains popular because almost any bad deal, risky stunt or awkward favor can be answered with the same blunt logic.