| Abbreviation | Definition |
|---|---|
| BLP | Best Looking Player |
| BLT | Back Low Throw |
| BLT | Better Luck Tomorrow |
| BLWS | Big League World Series |
| BMA | Beirut Marathon Association |
| BMC | British Mountaineering Council |
| BMFA | Burlington Minor Football Association |
| BMGC | Blue Mash Golf Club |
| BML | BalMoraL |
| BMR | Black Mountain Roundabout |
| BMS | Bristol Motor Speedway |
| BMSF | Blanc Mesnil Sport Football |
| BMTA | Benton MacKaye Trail Association |
| BMTA | Bismarck Mandan Tennis Association |
| BMTFL | Burlington Men's Touch Football League |
| BMX | Bicycle Motorcross |
| BMX | Bicycles Made Xtreme |
| BNAA | Bermuda National Athletics Association |
| BNAC | Buccaneer North American Championship |
| BNC | Big Name Cavers |