A RUB is a random unexpected boner. Kinda explains itself. Its comes and goes and is definitely not needed.
by Bob man meyers March 7, 2017
Get the R.U.Bmug. "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 January 14, 2005
Get the R.U.B.mug. by Kujo1200 August 3, 2007
Get the R.U.B.mug.