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 from the album Culture II Beta barium borate (β-BaB2O4) crystal Bundesbahn Österreich, a former name for the Austrian Federal Railways Bureau Bijzondere Opdrachten, a WWII Dutch secret service Bridge Base Online, for the game of bridge British Ballet Organization BBO, the ICAO code for Flybaboo The Basset–Boussinesq–Oseen equation for the motion of a sphere in an unsteady, low-Reynolds number, flow