With the influence such "R&B" has on today's youngsters, it probably stands for Robbin' & Burglin'.
It is a bloody nerve that this should be termed R&B. It's NOT rhythm, and it's definitely NOT blues! It's not even original any more - how many tracks can you spot that have sampled other artistes' backing tracks?
The chavs who lack total musical talent, who think they can string a few words together to make a four-letter word rhyme about blasting their mates' brains out with a shooter, should be forced to give up the R&B term - THEY DON'T DESERVE IT!