The phrase mixes English, don't worry, with Portuguese, seu merda, a rude insult roughly meaning you piece of crap, which explains why the clip travels mainly in Brazilian and Portuguese speaking meme circles. Its longer runtime sets it apart from short reaction buttons, as sharers often cut their favourite section for edits or play the whole rant for comic effect. Online it works as mock comfort, shared when someone is stressed, embarrassed or has caused a problem and deserves teasing more than actual sympathy or serious advice.