| RBG | Received By God (a Person In Receipt Of A Celestial Transfer) | - | NASA |
| RBS | Really Bad Shape | - | NASA |
| RHS | Rocking Horse Stool - Even Rarer Than Hen's Teeth | - | NASA |
| RLI | Rapid Lead Infusion - Obnoxious Patient Ought To Be Shot | - | NASA |
| RPVU | Relative Porsche Value Unit: Surgical Index Of Potential Income From The Repair Of Patient Injuries, Usually Orthopaedic In Nature. Fractured Finger = A Windscreen Wiper; A Fractured Hip = New Tyres Etc. | - | NASA |
| RR | Rocket Room - A Ward/unit Where There Are Many Deaths (many Transfers To Heaven) | - | NASA |
| RT | Room Temperature (dead) | - | NASA |
| RTTBBB | Rat-a-Tat-Tat With A Baseball Bat (hit With Blunt Instrument). | - | NASA |
| RTTL | Running Towards The Light - Dying | - | NASA |
| RUTUS | Rounding Up The Usual Suspects - Ordering A Set Of Tests For A Given Set Of Symptoms | - | NASA |
