Online, the phrase is Brazilian Portuguese slang, a playful way of saying someone is crazy after doing or saying something wild, and the spelling loko mirrors how it sounds in casual speech. Short reaction clips like this one circulate widely in Brazilian meme humour, where a quick spoken line can carry the whole joke. Because the delivery is instantly recognisable as a teasing reaction rather than a formal phrase, creators keep reusing it for fails, surprises and over-the-top moments, and its two-second length makes it easy to drop into edits without losing pace.