| Acronym | Definition |
|---|
| BBU | Battery Backup Unit |
| BBU | Bimbo Bakeries USA (Fort Worth, Texas) |
| BBU | Battery Back-Up |
| BBU | Backup Battery Unit (computer devices) |
| BBU | Bad Block Unreported |
| BBU | Boston Bluegrass Union |
| BBU | Back Boiler Unit (residential gas central heating boiler) |
| BBU | Borrelia Burgdorferi |
| BBU | Balanced Body University (pilates) |
| BBU | Billing Break-Up |
| BBU | Better Business Unit |
| BBU | Business Banking Unit |
| BBU | Beefmaster Breeders United (TX, USA) |
| BBU | Bucharest, Romania - Baneasa (Airport Code) |
| BBU | Beam Break Up |
| BBU | Base-Band Unit |
| BBU | Benelux Boxing Union (Netherlands) |
| BBU | Basic Bandwidth Unit |
| BBU | Barter Business Unlimited, Inc. (trade exchange) |
| BBU | Beefmaster Breeders Universal |
| BBU | Battlin' Business Units (Dilbert) |
| BBU | Brendon Boyd Urie (singer of Las Vegas band Panic At The Disco) |
| BBU | Built Bright University (Phnom Penh, Cambodia) |
| BBU | Boat Brokers USA (Connecticut) |