His promotion is long 'overdue'. = He is long 'overdue' for a promotion. [=he should have been given a promotion by now]
Her baby is 'overdue' by one week. [=her baby has not been born yet and it is a week since its birth was expected]
She reminded him that the rent was 'overdue'.
(..) So, if a volume from this collection should be stolen again, I'd know it. And you'd be dead before you ever left the compound. What if it's just overdue, you know? Any late fees I should know about? Maiming, perhaps? You know, people used to think that I was funny. Did that work for you? (..)2016 Doctor Strange