The phrase comes from Brazilian Portuguese everyday speech, where calma and relaxa are common ways to tell someone to settle down. As a short isolated clip it spread through soundboards, messaging apps and short video edits, especially in Portuguese speaking communities, because two seconds is enough to set up the joke. It stays popular as a light teasing reaction rather than a meditation cue, used whenever a chat, stream or video gets unnecessarily intense for a small problem and needs a calm voice to deflate it.