BBO may stand for: Barium boron oxide, another name of barium borate Big Bang Observer, planned space gravitational wave observatory IATA code for Berbera Airport "BBO (Bad Bitches Only)", a song by Migos featuring 21 Savage, from the album Culture II Beta barium borate (β-BaB2O4) crystal Black Bag Operations Bundesbahn Österreich, a former name for the Austrian Federal Railways Bureau Bijzondere Opdrachten, a Dutch secret service during World War II Bridge Base Online, a website for learning and playing bridge British Ballet Organization, a dance teaching and examination board Broome Bird Observatory BBO, the ICAO code for Flybaboo