| BRB | Babe Ruth Baseball 
| Others |
| BRB | Baby Richie Rocks
| Others |
| BRB | Back Rub Boy
| Others |
| BRB | Bacon Ricotta And Blueberries
| Others |
| BRB | Ballistic Re-entry Body
| Others |
| BRB | Ballistic Recoverable Booster
| Others |
| BRB | Bar-Room Bar
| Others |
| BRB | Barbados Seismograph station code
| Others |
| BRB | Barreirinhas Airport
| Others |
| BRB | Basic Reparations Benefits
| Others |
| BRB | BathRoom Break
| Others |
| BRB | Baths are boring
| Others |
| BRB | Battle Red Blog
| Others |
| BRB | Be Ready B***h
| Others |
| BRB | Be Ready B*itc
| Others |
| BRB | Be Ready B*tch
| Others |
| BRB | Be Ready Baby
| Others |
| BRB | Be Ready Before
| Others |
| BRB | Be Real B*tch
| Others |
| BRB | Be Real Brotha
| Others |
| BRB | Be Right Back
| Slang, Social Media |
| BRB | Be Right Back (Ayomide)
| Others |
| BRB | Be Right Back!
| Others |
| BRB | be right backPLS
| Others |
| BRB | Be Right Burger
| Others |
| BRB | Be Right Burgers
| Others |
| BRB | Be RightBackSome brb
| Others |
| BRB | Be Riht Back
| Others |
| BRB | Beam-Related Background
| Others |
| BRB | BedRoom Bully
| Others |
| BRB | Bees Are Brilliant
| Others |
| BRB | Believe Really Believe
| Others |
| BRB | Benefits Review Board
| Others |
| BRB | Big Red Barn
| Others |
| BRB | Big Red Battleship
| Others |
| BRB | Big Red Book
| Others |
| BRB | Big Red Bullet
| Others |
| BRB | Big Red Button
| Others |
| BRB | Big Rotating Building
| Others |
| BRB | Biological Resources Branch
| Others |
| BRB | Biomedical Research Building
| Others |
| BRB | Biometric Research Branch
| Others |
| BRB | Biosafety Review Board
| Others |
| BRB | Biosciences Research Building
| Others |
| BRB | Biostatistics Research Branch
| Others |
| BRB | Birmingham Rocket Boys
| Others |
| BRB | Birmingham Royal Ballet
| Others |
| BRB | Black Red And Blue
| Others |
| BRB | Blaire Reinhard Band
| Others |
| BRB | Blue Ribbon Bear
| Others |
| BRB | Blue Ridge Bank
| Others |
| BRB | Bob Renee and Brent
| Others |
| BRB | Bond Review Board
| Others |
| BRB | Brabus
| Others |
| BRB | Brazilian Rainbow Boa
| Others |
| BRB | Bridge Router Bridge
| Others |
| BRB | Brienz Rothorn Bahn
| Others |
| BRB | Bright Red Blood
| Others |
| BRB | British Railways Board
| Others |
| BRB | British Roo Bars
| Others |
| BRB | Britton Robinson Buffer
| Others |
| BRB | Broad Run Blonde
| Others |
| BRB | Bryant Colege, Smithfield, Rhode Island Library code
| Others |
| BRB | Buckling Restrained Brace
| Others |
| BRB | Budget Review Board
| Others |
| BRB | Bug Review Board
| Others |
| BRB | Buns Running Backwards
| Others |
| BRB | Busy Rescuing Batman
| Others |
| BRB | Butler Rogers Baskett
| Others |
| BRB | Butts Remember Bouncing
| Others |
| BRB | Bye right back
| Others |