| Acronym | Definition |
|---|
| BRB➣Be Right Back (chat/slang) |
| BRB➣Barbados (ISO Country code) |
| BRB➣Brandenburg |
| BRB➣Birmingham Royal Ballet |
| BRB➣Be Right Back |
| BRB➣Benefits Review Board (US Department of Labor) |
| BRB➣Brienz Rothorn Bahn (Swiss railway) |
| BRB➣British Railways Board |
| BRB➣Bond Review Board (Texas) |
| BRB➣Banque de la République du Burundi (Central Bank of Burundi) |
| BRB➣Bar Room Bar (UK) |
| BRB➣Bathroom Break (chat) |
| BRB➣Big Red Button |
| BRB➣Benelux Research Business |
| BRB➣Biometric Research Branch |
| BRB➣Brigade de Répression du Banditisme (French police) |
| BRB➣Builders Registration Board (AU) |
| BRB➣Buckling-Restrained Brace (engineering) |
| BRB➣Big Red Balls (gaming) |
| BRB➣Brazilian Rainbow Boa (herpetoculture) |
| BRB➣Butler Rogers Baskett Architects |
| BRB➣Bright Red Blood (medical) |
| BRB➣Benzodiazepine Receptor Binding |
| BRB➣Bath Room Break |
| BRB➣Blue Ridge Broadcasting |
| BRB➣Business Research Bureau |
| BRB➣Blue Ridge Boogie |
| BRB➣Busy Rescuing Batman |
| BRB➣Baseline Review Board (US Navy) |
| BRB➣Black River Boats |
| BRB➣Budget Review Board |
| BRB➣Briggs Rainbow Buildings, Inc. |
| BRB➣Biweekly Rate Booklet |
| BRB➣Base Rate Boundary |
| BRB➣Bug Review Board |
| BRB➣Brittany Rolled Baits |
| BRB➣Business Reducing Barriers (UK) |
| BRB➣Big Red Band |
| BRB➣Bernard and Audre Rapoport Building (University of Texas, Austin) |
| BRB➣Bayerische Regionalbahn (German: Bavarian Regional Rail; Bavaria, Germany) |
| BRB➣Bongibault Rénovation Bâtiment (French building renovation company) |
| BRB➣Black Raid Bulls (French airsoft club) |
| BRB➣Batteries de Renseignement de Brigade (French armed forces unit) |
| BRB➣Buried Ruins of Bacaba (gaming, Outwar Zone) |
| BRB➣Banco Regional de Brasília SA (Brazilian bank) |
| BRB➣Baguio Realtors Board (Philippines) |