"disreputable, vulgar," 1795, from raff "people," usually of a lower sort (1670s), probably from rif and raf (mid-14c.) "everyone, everything, one and all," from Middle English raf, raffe "one and all, everybody" (see riffraff). Related: Raffishly; raffishness.
"large miscellaneous collection," by 1830, said to be a variant of raff "heap, large amount," a dialectal survival from Middle English raf (compare raffish, riffraff), with form and sense associated with raft (n.1). But this use of the word emerged early in U.S., where raft (n.1) had meant "large floating mass or accumulation of fallen trees, logs, etc." by 1718.