A Frusin is dear friend, but not a relative. Someone so close that your parents call them cousins. A Frusin seems like a cousin and forced your parents to explain to you that you aren’t actually related to them. A Frusin is someone you met when you were 8 years old or younger. You can’t meet a Frusin in middle school or High School, or college. While those friends from school or summer camp may be life long friends, they are not Frusins. A Frusin is usually your parent’s close friend’s children - close family friends who met you the day you were born. No, your actual cousin cannot be your Frusin.