As an epithet, Riff Raff, belongs to a category of insults focusing on behavioral characteristics (such as mannerisms, lifestyle) rather than overt racial characteristics (as with nigger, yid).

Other specific meanings pertain to music and films.

Music

• Riff Raff were a UK progressive rock band formed by keyboardist Tommy Eyre in 1972. See Riff Raff (band)
• Riff Raff were a UK pub rock/punk band formed by Billy Bragg, Wiggy amongst others.
• Riff Raff Was a song on the AC/DC album Powerage(1978).

Films

• A 1935 movie starring Jean Harlow.
• In the film and play The Rocky Horror Picture Show, Riff Raff (A Handyman) is the servant of Doctor Frank-N-Furter.