Green’s Dictionary of Slang

do-righter n.

also do-rightie
[i.e. others must do what is ‘right’]

(US) a law-maker, one who lays down the law for others.

Show quotations
[US]N. Algren Walk on the Wild Side 93: Stuffed shirts and do-righties owned these shows [...] It [i.e. hypocrisy] was an ancestral treachery that all do-righters practice [...] when it’s all bought and paid for there’s always one thing sure: it’s some Do-Right Daddy-O running the whole show.