The phrase comes from Brazil's pop culture surrounding Valesca Popozuda, the funk carioca singer whose 2013 hit Beijinho no Ombro turned a kiss on the shoulder into a national symbol of unbothered confidence. The keep calm mashup mixes that attitude with the famous keep calm poster format, and it caught on as a WhatsApp audio and short-form video punchline. Online it is used the way the song is used: not to describe an event, but to perform indifference toward envy, which keeps the line circulating years after its peak.