I was visiting an elderly lady, trying to have a conversation with her. She had five or six grandchildren visiting her, and they were having a blast : screaming, shouting, laughing.
She stopped right in the middle of our talk and shouted, "Famå'kaka! Kalan man fefferia hit!"
Feria means "fair," as in the country fair or a carnival. It comes from the Spanish word "feria," meaning "fair, show, festival." That was taken from the Latin word "feria," which can mean "fair" or a "weekday."
So grandma was telling the kids, "Keep quiet! It's as if we're at the carnival!"