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1. Riff-Raff
Un-savory people in our society. People you do not want to be associated with.
Ex. If this was America it would be a gated community in order to keep all the riff-raff out.

Ex. Look at all the riff-raff over there.
2. riff-raff
Unworthy plebeians who lack the elegance and civility to mingle in high society.
Refined gentlemen sit above the juvenile tomfoolery of the riff-raff.
3. riff-raff
"Faithful Handyman"

Enjoys walks around the castle, harassing creations with fire, The Time Warp, and incest
Janet: You killed them!
Magenta: But I thought you liked them. They liked you.
Riff Raff: THEY DIDN'T LIKE ME! THEY NEVER LIKED ME!
4. Riff-raff
The term used to describe people who try to gatecrash and just generally rain on your parade also known to be filthy and annoying.
Person 1: Where do you live?
Person 2: I can't tell you
Person 1: Why not?
Person 2: I don't want random riff-raff beating on my doors
Person 1: *offended*
5. riff-raff
a person of society who does not really give a damn about anything
Dude #1 My GOD is there anything that this person cares about?!

Dude#2 Nope he is Riff-Raff
6. riff-raff
White rapper who is "hotter than a old thelma and louise sweater"
Riff-Raff "Diamonds cause head on collisions, ruined the transmission on your brand new prescription"
7. riff-raff
generally people of a lower class, in most cases people that don't carry an Amex Centurion Card.
Dude, he is trying to pay his half bottle of Cristal with his lowly Platinum Card, how pathetic!