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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.
by Jay_in_Ottawa July 04, 2006
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A male or female who has no motivation whatsoever. They do not work, mooch off of people and are totally content in doing so. They would much rather just hang out all day long, and are content with how things are and don't ever plan on making things better, even if it can help them in relationships.
When deciding whether or not to get a job,Jake,the riff raff decided he would much rather just hang out and do nothing for the day.
by Good Golly May 22, 2009
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A negative term for people that lack social grace, education or that have minority status.
The new housing that's going up is driving out the riff raff.

I enjoy the Midwest because of it's low amount of riff raff.
by Barrando October 10, 2011
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The all-time best rapper with a known set of complex skills including shoting BBs through cheerios from 50 yards away, tip toe wing in Jordan shoes, and being a man. Also known for his aquaberry shark grill.
"Did you hear Riff Raff's new album?"
"Of course! It was fire!"
by trumpeteer007 January 12, 2015
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