The phrase 'mais ou menos' is everyday Brazilian Portuguese for more or less, so-so or kind of, and it is widely used as a lukewarm answer in conversation. Online, stretching the opening sound into 'éééé' turns that ordinary reply into a recognisable reaction meme. Short voice clips like this circulate on soundboards and in messaging apps because they can stand in for a whole attitude in a few seconds, letting creators and friends reply with hesitation, doubt or mild disappointment without recording their own voice.