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1.
RBO
Acronym standing for "Rock et Belles Oreilles", a legendary french-canadian comedy group active from the 1980s up to the mid-1990s.
Wow, ta joke est de qualité RBO.
by Edgar Pruviance May 26, 2009
 
2.
Random Boner Occurance
I got an R.B.O. in the middle of class today!
by Michael Perkins June 20, 2006