It’s about time. We are now on Instagram!
"disreputable, vulgar," 1801 (first attested in Jane Austen), from raff "people," usually of a lower sort (1670s), probably from rif and raf (mid-14c.) "everyone," from Middle English raf, raffe "one and all, everybody" (see riffraff). Related: Raffishly; raffishness.