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