Emily Dickinson Lexicon

RAFF, n.

1. The sweepings of society; the rabble; the mob, [colluvies.] This is used chiefly in the compound or duplicate, riffraff. [Pers. رُفْتَه roftah, L. quisquiliae, sweepings.]
2. A promiscuous heap or collection; a jumble. – Barrow.