SNRB Share definition Flag (acronym)- School No Reason Boner. A random boner while sitting in class, for no apparent reason. Man I was sittin in class the other day and out of nowhere I just got a giant snrb! SNRB by jorge rigo May 5, 2007 0 0 Get merch Get the SNRB mug. Buy Now — $32.95 See more merch
