Nipple to Breast Ratio (N.B.R.) Share definition Flag The ratio the areola to breast, in which the breast will be judged upon. Jenny had bad N.B.R. because her nipples were the size of dinner plates. Nipple to Breast Ratio (N.B.R.) by JoeVandal September 8, 2003 0 0 Get merch Get the Nipple to Breast Ratio (N.B.R.) mug. Buy Now — $32.95 See more merch