RBO Share definition Flag Rbo is a gang in Rhode Island Rbo stands for real b**ches only and a gang that’s soft. They are mostly from Cranston and prov. Her: is that a rbo kid Best friend: yeah it is they’re soft RBO by Memearelife May 27, 2019 0 0 Get merch Get the RBO mug. Buy Now — $32.95 See more merch