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1. R.U.B.
Rich Urban Biker.

See also RUB
"I'm not sure what is worse a middle aged R.U.B. on a Harley or a 19 year old SQUID riding a GSX-R1000!"
by Steve Johnsenson Jan 14, 2005 add a video
2. R.U.B.
Stands for Really Ugly Bitch.
"Man, that is one R.U.B. right there."
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