“Tenha calma, moreno” is best known online as a Portuguese reaction audio shared in meme edits and WhatsApp forwards. Its exact original source is not widely documented, so people mainly recognize it through reposts, short videos and audio compilations rather than a single creator or show. The phrase stayed popular because it is simple, quotable and useful in many situations where someone is acting impulsive, annoyed or overly excited. That flexibility keeps the clip circulating in Brazilian meme culture and casual reaction content.