| Acronym | Definition |
|---|
| BYB | Belarussian Ruble (currency code; now BYR) |
| BYB | Back Yard Breeder (unprofessional dog breeder) |
| BYB | Backyard Babies (band) |
| BYB | Building Your Business |
| BYB | Behind Your Back (Internet slang) |
| BYB | Backyard Baseball |
| BYB | Back Yard Burgers, Inc. (restaurants; Nashville, TN) |
| BYB | Back Yard Band (band) |
| BYB | Back Yard Boards |
| BYB | Bring Your Buddy |
| BYB | Benefit Year Beginning (tax filing) |
| BYB | Burbank YMCA Bluefins (swim team) |
| BYB | Buckingham Youth Brigade (Arlington, VA) |
| BYB | Backyardbashers (radio controlled scale model vehicles) |
| BYB | Bone Yard Boys (band) |
| BYB | Berkshire Youth Ballet (UK) |