| Abbreviation | Definition |
|---|---|
| BCS | Baylor's Conference Schedule |
| BCS | Blame Coach Snyder |
| BCS | Bowden Championship Series |
| BCS | Bowl Championship Series |
| BCSA | Berks County Swim Association |
| BCT | Bonneville Cutthroat Trout |
| BCU | British Canoe Union |
| BCYA | Bloom Carroll Youth Athletics |
| BDA | Blue Dolphin Aquatics |
| BDAD | Blue Devil Athletic Development |
| BDBRA | British Dragon Boat Racing Association |
| BDGC | Burnaby Disc Golf Club |
| BDL | Below Detectable Level |
| BDO | British Darts Organisation |
| BDP | Blue Devil Pride |
| BDSL | Bradford Disability Sport and Leisures |
| BDSL | Buffalo District Soccer League |
| BE | Bike Evolution |
| BEAM | Balance, Energy, Attitude, and Motion |
| BEAM | Breathe, Energize, Align, and Move |