| Abbreviation | Definition |
|---|---|
| RJ | Roger Joshua |
| RJ | Ron Jon |
| RJ | Rosco, Junior |
| RJ | Rosta, Junior |
| RJ | Rusty, Junior |
| RJ | Ryan Justin |
| R-J | Ryan-Junior |
| RKB | Ro-Kyu-Bu |
| RKR | R. K. Radhakrishna |
| RL | Replacement Lizard |
| RM | Rashid Minhas |
| ROB | Robert |
| ROD | Rodney |
| ROK | Right of Kings |
| ROL | Roland |
| Rollercoasterbridge | Eshima Ohashi Bridge (Japan) |
| Ron | Ronald |
| RONNIE | Aaron |
| ROSE | Rosalyn |
| ROTFL | Roll On The Floor Laughing |