| Abbreviation | Definition |
|---|---|
| RSPCP | Royal Society for the Prevention of Cruelty to People |
| RSPCP | Royal Society for the Prevention of Cruelty to Pokémon |
| RSS | Real Slim Shady |
| RSS | Roach Support System |
| RSS | Rumor Spreading Shop |
| RSU | Re Spawners United |
| RSVP | Rabbit Stew Very Pleasing |
| RSVP | Rare Songs Very Personal |
| RSVP | Really Strange Verified DogPeople |
| RSVP | Really Stupid Viral Protection |
| RSVP | Really Stupid Vocal Performance |
| RSVP | Remember Sza Vedding Presents |
| RSVP | Remember to Send Valuable Presents |
| RSVP | Reserved for Special Valuable Person |
| RSVP | Retarded Student Voluntary Program |
| RSVP | Return Soon Via Phone |
| RSVP | Rice Stew Very Plenty |
| RSVP | Rice & Stew Very Plenty |
| RSVP | Roaming Super Villain Party |
| RTD | Really Tight Derriere |