| Abbreviation | Definition |
|---|---|
| RES | Red Eared Slider |
| RESULTS | Responsibility for Ending Starvation Using Legislation Trimtabbing and Support |
| RF | Reality Factory |
| RF | Ripper Free |
| RFD | Request For Deprecation |
| RFID | Really Freaking Immense Datasets |
| RFK | Rolf For King |
| RFL | Really Friggin Loud |
| RFM | Retired Forked Merged |
| RFO | Raven Fox Organization |
| RFO | Roxette Fan Organization |
| RFP | Request For People |
| RFR | Radio Free Roscoe |
| RFS | Ring Finger Syndrome |
| RFZ | Rapid Fanfic Zombie |
| RG | Random Guy |
| RGM | Real Good Man |
| RGP | Really Great Prozac |
| RGS | River Of Golden Sliptingers |
| RHC | Red Hair Crue |