| B&T | Bagged And Tagged - Body Ready For Dispatch To Morgue | - | NASA |
| B-52 | Combined 5mg Of Haldol IV + 2mg Of Ativan IV | - | NASA |
| BBB | Blood-Brain Barrier - Surgical Drapes | - | NASA |
| BBCS | Bumps, Bruises, Cuts And Scrapes (i.e. No Serious Injuries) | - | NASA |
| BBLS | Belly-button Lint Sign - Male, Middle-aged, Overweight And Hairy (an Umbilicus That Looks Like The Lint (fluff) Trap In A Tumble Dryer Is Most Common In Overweight, Hairy, Older Men). Known As Belly-Button Fluff Sign In The UK. | - | NASA |
| BFF | Big, Fat Faker | - | NASA |
| BFH | Brat From Hell (usually Accompanied By PFH - Parent(s) From Hell) | - | NASA |
| BFH | Big Fucking Head; Hydrocephalus As In A "FLK With A BFH" (can Be Metaphorical For Arrogant Consultant) | - | NASA |
| BIT | Burp In Transit (gas Seen In The Stomach On An Abdominal Film) | - | NASA |
| BMT | Bowel-Movement Taco (faecal Matter Trapped In Female Genitalia) | - | NASA |
| BMW | Bitch Moan & Whine | - | NASA |
| BOHICA | Bend Over, Here It Comes Again | - | NASA |
| BSS | Bilateral Samsonite Syndrome: Patient Admitted With Both Their Bags Packed In Preparation | - | NASA |
| BTH | Bury The Hatchet - Accidently Leave A Surgical Instrument Inside A Patient. | - | NASA |
| BTSOOM | Beats The Shit Out Of Me | - | NASA |
| BUNDY | But Unfortunately Not Dead Yet | - | NASA |
| BVA | Breathing Valuable Air | - | NASA |
| BWCO | Baby Won't Come Out (needs Caesarian) | - | NASA |
