mirna Bosna

1. colloq. (at the end of a sentence) and that's that; and everyone's happy
   Podelićemo pare na pola i mirna Bosna. — We'll split the money in half and that's that.
   Izvini mu se i mirna Bosna. — Just apologise to him and that's the end of it.

Usually comes at the end of a sentence, after i.