BBO

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